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His Master's Voice wrote:The current fluff almost directly states the Tau brainwash themselves and pretty much any subordinate race they come in contact with. If the Imperium is dogmatic, the Tau are a cross between Hitlerjugend and Soviet re-educational camps.

Because Hitler and Stalin were famous for ending bloodshed and teaching peace and the value of life, riiight!
Let's just say you believe unbacked posts by Tau-haters more than the explicitely expressed intention by the designers of the Tau race.

Well, I certainly welcome any change/improvement to Tau fluff. Right now, they are the Dodo birds of the galaxy. Still, taking the Imperium's xenophobia away seems--well, pretty strange.

Aaargh, I.. I don't know. At first I was spitting acid about random charge measurements... But combined with being able to pre-measure, it may be a useful mechanic to add incertainty to the action.

As for Allies, can someone explain how this works in Fantasy? This is my biggest fear - every army has it's strengths and weaknesses which gives it their character... All I can picture is everyone needing to mix armies to be competitive and get the best units from their respective codices; to the point where you are handicapping your self if you don't field a galactic "All-Star" team...

Chaos- the new squats. If any of the fluff changes are real

Motograter wrote:Chaos- the new squats.

We can only hope - there's a growing galactic shortage of spiky bitz...

The only way this schlock could be less believeable is if it continued the rofl-stomping antics of Draigo tagging his initials on the actual god Khorne combined with the Imperium finding a way to allow Space Marine geneseed implantation into Sisters of Battle. Only then would it include all of the most common fluff troll thread topics instead of just a simple majority of them.

AgeOfEgos wrote:Still, taking the Imperium's xenophobia away seems--well, pretty strange.

Tau are so immensely sub-human that they're little more than animals to Space Marines. The same way that the Imperial Guard use horses and the Grey Knights use tech-monkeys, the Space Marin...

...wait...

...this rumor is from Blood of Kittens?

...Why are we still discussing it?

MIKEtheMERCILESS wrote:Aaargh, I.. I don't know. At first I was spitting acid about random charge measurements... But combined with being able to pre-measure, it may be a useful mechanic to add incertainty to the action.

As for Allies, can someone explain how this works in Fantasy? This is my biggest fear - every army has it's strengths and weaknesses which gives it their character... All I can picture is everyone needing to mix armies to be competitive and get the best units from their respective codices; to the point where you are handicapping your self if you don't field a galactic "All-Star" team...

In fantasy you can't take multiple armies in one. When you have games that have more then 1 player per side, there are rules that state how well the armies work together. Three differant levels, from trusted to hated. Dependant on the level, you could get more bonuses from the alliance, or more draw backs.

It sounds like this would be more like 2nd Editions Allies rules. No more then 25% of your army could be from a certain army book, with certain units from that army.

His Master's Voice wrote:
That's irrelevant. No examples of corrupted Necrons won't make them saviors of humanity. In fact, in the previous iteration of Necron fluff, they had this idea of sealing off the Empyran from the real world, because the C'tan didn't like demons mucking about on their lawn. Now that would classify as saving everyone from Chaos.

I might point out that we suddenly had them allying with the Imperium too.

His Master's Voice wrote:
The current fluff almost directly states the Tau brainwash themselves and pretty much any subordinate race they come in contact with. If the Imperium is dogmatic, the Tau are a cross between Hitlerjugend and Soviet re-educational camps.

Source? Remembering that the non-canon ending to the Dawn of War games is just that: Non-canon. For your argument, they might as well be (un)fanfiction.

Absolutionis wrote:Tau are so immensely sub-human that they're little more than animals to Space Marines. The same way that the Imperial Guard use horses and the Grey Knights use tech-monkeys, the Space Marin...

...wait...

...this rumor is from Blood of Kittens?

...Why are we still discussing it?

I can feel the hate... flowing...

And, sadly, BoK has been on the ball on occasion. ATM most people are praying they're wrong. I, however, am praying they're right. And it would fit in the trend. The last several codices have contained Epic trolls of the fandom, why not make 6th an entire troll edition?

warboss wrote:The only way this schlock could be less believeable is if it continued the rofl-stomping antics of Draigo tagging his initials on the actual god Khorne combined with the Imperium finding a way to allow Space Marine geneseed implantation into Sisters of Battle. Only then would it include all of the most common fluff troll thread topics instead of just a simple majority of them.

And your disbelief in GW's stupidity comes from? Particularly given your avatar is a facepalm about Finecast...

Besides, I don't know if you've noticed, but some of the writers seem to go to 4chan just to gather up the most rage inducing ideas they can, and use them as ideas for the next book.

And, besides, I already made the FSM joke a few pages back. If it's not in there, I look forward to it being the first codex of 6th.

OK, I know nothing about fantasy, except that their models come on square bases and the units move in 'block' formation, "it's more complicated than 40k" and the Lizardmen are the model range that got me into the hobby (still my favorite model range-I just don't have an interest in playing fantasy).

What does "Random Charge Length" mean? Instead of assaulting 6 inches (mostly), it becomes d6 inches like running?

Wouldn't everyone just switch to Greyknights/build their armies exclusively for shooting in that case? And how exactly would that effect units with an 'assault move' like tau Crisis suits, and Eldar Jetbikes?

Also...if it's "that bad" couldn't we, as a community just do a little White-Out Vetoing of the rules that suck/don't make sense? I know as "nerds" we are naturally the most exclusive group on the planet-and everybody's got their little Set or Flag Waving group, but there's enough big communities and blogs that if the gak ain't right, that some sort of compromise could come forth...

Stanley Rubric wrote:
In that case who gives a gak what the high lords say, as they're weaker than the astartes. There is no modern equivalent to this as we might have the Church here IRL but no superhuman enforcers of their creed with a direct bloodline to God himself.

A) high Lords of Terra command billions of troops. They're hardly weaker than the combined forces of all SM chapters.

B) We're talking about Adeptus Astarates. You know, those guys that recite litanies of hate before battle and follow the human supremacy ideology laid out by this guy sitting on a golden toilet on Earth.

Pacific wrote:
The 40k universe is run by dogma and reverence for traditions that spread back over 10,000 years. Look at our own history - when 'new' prophets or religious philosophers came up with some new idea about how things should be, the results were almost always bloody. Not because they were just challenging the faith of those traditionalists, but also the structures of power that were built around them. The Imperium in the 40k universe takes that idea to a ridiculous extreme - it doesn't matter if the 'proof' was a DNA-stamped approval letter from the Emperor, the heads of the Imperial government/church would never tolerate it's existence, not least because of the challenge it would represent to their rule. The dogma extends to humanities inherent and divine superiority over the alien, making it even less likely to be heeded - to borrow a joke from Red Dwarf, it would be like the discovery of a lost first page of the Bible saying, "All of the events in this book are fictitious, any characters or events similar to real people..... " etc. What do you think the Catholic church would do in such a situation?

That was kind of my point; some of the Imperium (the more "devout" SM chapters for instance) would take any order from the Emperor, if it could be verified, whereas the factions more invested in the current power structures (like the High Lords) would denounce it as heresy. This could lead to all sorts of interesting storylines as humanity teeters on the brink of another Age of Strife. Of course the whole thing could be totally ballsed up by one over-enthusiastic codex writer, so I really don't want it to happen. I was just trying to put a little bit more of a positive light on this frankly quite unlikely rumour, rather than assuming it was a sign of the end of times...

For fluff folks:
How do you justify all the marines fighting each other on tabletops under the current fluff? At least an ideological schism would make sense.

Kroothawk wrote:

His Master's Voice wrote:The current fluff almost directly states the Tau brainwash themselves and pretty much any subordinate race they come in contact with. If the Imperium is dogmatic, the Tau are a cross between Hitlerjugend and Soviet re-educational camps.

Because Hitler and Stalin were famous for ending bloodshed and teaching peace and the value of life, riiight!

Right, because if you decline following the Greater Good, the Tau leave you be.

No, wait, you get a railgun round to the face.

And both Hitler ans Stalin were working towards a world where all people would live in peace and harmony. Provided they followed the same ideology or belonged to the correct race of course, but that's a minor detail in the grand scheme of things. What's a couple billion dead people when you get a perfect society, right?

Kroothawk wrote:Let's just say you believe unbacked posts by Tau-haters more than the explicitely expressed intention by the designers of the Tau race.

So what you're saying is that someone involved in the design of Tau said they're peace loving hippies? Seriously? Can I get a quote on that, because as much I thought it impossible, I might dislike Tau even more now.

And that's still not addressing my initial point of Tau not making sense as the saviors of humanity.

agnosto wrote:For fluff folks:
How do you justify all the marines fighting each other on tabletops under the current fluff? At least an ideological schism would make sense.

Right, or the Nid - IG - Chaos marine (who have no arms) combo fighting alongside each other, which seem to be a sizeable percentage of most games played?

In the same way that a lot of people said sarcastically, "Oh, we never thought of dumping hundreds of minis on the table in one big battle before" when Apocalypse was released, an allies rule probably wouldn't make a huge difference to the majority of casual games. Especially for younger players, who (not unreasonably) can't keep their concentration on the 2-3 years it will probably take to make up a reasonably sized army, for the most part they will have been playing with a mix of stuff anyway.

Lol, what horrific fluff.

I can see a lot of Ward with this. Making the Space Marines even more perfect. Now the Ultramarines and the Tau will spread the greater good!

If the Tau need an ally, make it the Eldar.

agnosto wrote:For fluff folks:
How do you justify all the marines fighting each other on tabletops under the current fluff? At least an ideological schism would make sense.

I don't. There is no justification that would also allow for a Special Character fighting him- or herself, and the attempt would only weaken the fluff. Better to just write such battles off as uncanon entertainment, nothing more.

His Master's Voice wrote:

Stanley Rubric wrote:
In that case who gives a gak what the high lords say, as they're weaker than the astartes. There is no modern equivalent to this as we might have the Church here IRL but no superhuman enforcers of their creed with a direct bloodline to God himself.

A) high Lords of Terra command billions of troops. They're hardly weaker than the combined forces of all SM chapters.

B) We're talking about Adeptus Astarates. You know, those guys that recite litanies of hate before battle and follow the human supremacy ideology laid out by this guy sitting on a golden toilet on Earth.

Everyone making the argument on the limitations of the Adeptus Astartes ignore the fact that as angels of the Emperor they would have more sway in convincing IG and other imperial forces to join them than even Chaos has on top of that many chapters have planetary Governments under their direct command guaranteeing a level of support in a protracted campaign beyond that of just their chapter. That's before any sense of loyalty or debt worlds may feel for a chapter that came to their rescue. If chaos can do it easily enough what can those truly loyal to the Emperor accomplish.

I don't tend to believe these rumors but Ive heard crazier. If its true it's sounds like GW is simply trying to rewrite fluff to cluster different factions into larger more directly opposed groups, in that way groups like the Tau and Necron who are drawn into these global campaigns in convoluted ways can contribute and participate in more meaningful ways. It's just like how Blizzard with WoW rewrote their settings geopolitics to create the two larger player factions.

His Master's Voice wrote:

Kroothawk wrote:

His Master's Voice wrote:The current fluff almost directly states the Tau brainwash themselves and pretty much any subordinate race they come in contact with. If the Imperium is dogmatic, the Tau are a cross between Hitlerjugend and Soviet re-educational camps.

Because Hitler and Stalin were famous for ending bloodshed and teaching peace and the value of life, riiight!

Right, because if you decline following the Greater Good, the Tau leave you be.

No, wait, you get a railgun round to the face.

And both Hitler ans Stalin were working towards a world where all people would live in peace and harmony. Provided they followed the same ideology or belonged to the correct race of course, but that's a minor detail in the grand scheme of things. What's a couple billion dead people when you get a perfect society, right?

Kroothawk wrote:Let's just say you believe unbacked posts by Tau-haters more than the explicitely expressed intention by the designers of the Tau race.

So what you're saying is that someone involved in the design of Tau said they're peace loving hippies? Seriously? Can I get a quote on that, because as much I thought it impossible, I might dislike Tau even more now.

And that's still not addressing my initial point of Tau not making sense as the saviors of humanity.

So... in your view there are only two options? Peace loving Hippies and Mindcontrolling megalomaniacs? Because that's how you are framing your response.

The Tau have an entire 5th of their race devoted to negotiation. If they encountered a human world and told them "This world is ours now, you are subject members of the Tau Empire, pay us taxes," and the humans said no thanks, the Water Caste would go in to resolve the matter. If the humans want to stay, they can fight or join the Empire. If they wanted to leave, the option would be given, and the Tau would just let them go. If they wanted to fight, the Tau would do so until it was no longer necessary. The Tau are too pragmatic to slaughter life forms needlessly: such actions do not serve the Greater Good. It is more established in the fluff that waves of Water Caste Negotiators go to inhabited worlds to broker deals than Firewarriors conquer those planets. It just doesn't happen. It is more useful to negotiate than to waste resources in a battle. The Imperium, however, is frustratingly uncompromising in this regard...

If you think the Tau Empire is a "Join or DIE!" kind of situation, then you are ignoring the fact that there are many member races in the Empire, the most prominant of which, besides the Tau, are the Kroot. A race who only has a portion of its members fighting for the Tau. The rest are doing other things, even serving other races. There is no even IMPLIED piece of fluff stating that the Kroot are slaves or under duress. Go read up on the race, they are far more interesting than you are giving them credit for.

Any fluff progression of this type would be moronic. I'd rather they advance the fluff by removing the race than turn them into the Dick Graysons of 40k.

See now I want to do a Batman Space Marine, and a Tau Firewarrior in Robin colours.

Kroothawk wrote:

His Master's Voice wrote:The funny thing is, Tau as the saviors of the galaxy do not make any sense under the current Chaos fluff. None whatsoever. Chaos is a threat because sentient creatures make it a threat. It's not like Nids that come from somewhere, go somewhere and can be stopped inbetween. Chaos doesn't have a real goal and will exist as long as hate, rage, lust and all the other voices exist. So the only way Tau can save Humanity from Chaos is by brainwashing every single human (and Eldar and probably a bunch of other races) into a mindless drone. That will starve the Chaos gods and bring everlasting, drooling peace.

Actually it does and is strongly hinted at in current fluff.

1.) Tau being immune to Chaos: No incident of corrupted tau in the Codex. The old Daemonhunter Codex lists several scenarios why they should fight other races instead of just daemons: The Tau entry doesn't list corrupted Tau. In the novel Firewarrior, a daemon finds "one in a million" of Firewarriors where he sees a chance of corruption (he doesn't even try the ethereal). In the end he utterly falis even with this exceptionally emotional Firewarrior. The (controversial book) Xenology strongly hints that Eldar created the first Ethereal to create a race immune to Chaos. And having a low presence in the warp, no psykers and no idea of what warp and Chaos is, adds to the picture.

2.) Mankind and the universe are in a state of global Montau, where people out of their mind are slaying each other for no reason at all. Hate and fear rule. This is worse than even today's earth. Now imagine that charismatic leaders preach peace, love and understanding in Dalai Lama style. Or control their emotions like Vulkans did. This could definitely weaken Chaos and break up the stalemate. Having a big mobile army immune to Chaos corruption helps of course, and having a new ally instead of another enemy as well.

Not saying that the BoK rumours are correct of course. Just discussing the possible consequences.

Sorry, youre missing the consequences. Which are, rewritten Tau. You may not even see any similarities after they are redone....
Because, to insert the Tau as something the Emperor wrote about, means to alter their history ( create them before the GC ) as he doesn't seem to be the prophetic one who can foresee the future if the current background is still partially valid then. Plus those who can't identify a threat, like necrons and DE, shall contribute what exactly against chaos, a threat so varied it isn't just a source of screaming hordes of cultists coming at you? Really? The race known to attack whoever is busy fighting off nids provides what exactly against a galaxy wide threat?
More backstabbing?
The so called picture is one of a race, unknowing of most of the threats they haven't met and dismissing any warning older inhabitants of this galaxy may give them. A low presence may keep the demon uninterested, it won't stop the mortal minions of chaos. No psykers is nice until you find out you can't stop the psykers at all, you can't close that rift where nigh limitless hordes stream out of, etc etc.

The species aren't in a state of Mon'tau, as mon'tau only exists in the Tau's view of the world. Humans aren't going to go extinct by a little civil war, they tend to survive it. Humans don't need someone to pacify them, like those weak Tau do. Humans can have emotions without restricting their thoughts to a "greater good" just to keep their hands off of their neighbours throat. Sorry the ones to survive without help aren't the Tau. Now, sure this failure of fluff could keep the Tau alive by Ultramarines are BFF now plot armor.....

Plus there is no stalemate vs chaos. Chaos lacks the attention span to achieve anything that lasts. Chaos is the usual villian faction, always scheming but never winning. Where is your stalemate now?
And finally, the Tau are not big, not mobile, and surely the least likely challenger of chaos.

Pacific wrote:
So, for me, this is if true would be a thousand times worse than the BA and Necrons 'teaming up'. That was just a badly written paragraph taken out of context, this would be a reversal of the most fundamental concepts of the 40k universe, which have been built up over twenty years of rule books, codecies and Black Library material.

It would also involve taking the clock forward, which again would mean a first in the history of the descriptions of the game universe where it has always been a quarter to midnight.

So in short if this does come to pass.. then the time of ending really has arrived, and we can kiss goodbye to the game universe that so many of us have enjoyed for so long.

Exactly.
The moment this becomes real is the real end times..

Imagine the rulebook sold and the fluff changed......... but you have to have a codex too and there it stays as is....
The 180°turn pretty much in black and white. Methinks some here are unaware how many only stick with 40k because of the background.
Go for change for the sake of change and there won't be enough beer to make this bearable.

Kroothawk wrote:
Because Hitler and Stalin were famous for ending bloodshed and teaching peace and the value of life, riiight!
Let's just say you believe unbacked posts by Tau-haters more than the explicitely expressed intention by the designers of the Tau race.

Can we keep those 2 out of this?
And lets assume your backup isn't outdated and most likely replaced by something else as the subject of this thread doesn't sound like there would be any intend to stick with the intent of any race from the time when it was designed. Why should your holy cow be different?

agnosto wrote:For fluff folks:
How do you justify all the marines fighting each other on tabletops under the current fluff? At least an ideological schism would make sense.

Training, accusations of heresy, theft of chapter relics, making fun of our primarch, etc etc.... pretty easy

His Master's Voice wrote:
So what you're saying is that someone involved in the design of Tau said they're peace loving hippies? Seriously? Can I get a quote on that, because as much I thought it impossible, I might dislike Tau even more now.

And that's still not addressing my initial point of Tau not making sense as the saviors of humanity.

You never get a quote saying that.....
As the designers never said so and GW already moved on to darken the Tau.


I think the focus in 6th could move to chaos, but if this turns out to become LotR in space and our shades of grey are replaced by black & white and the factions have to suffer retcons to fit into such fantasy like scheme, then yes its time to let it end.

Let us hope that the fluff changes are fiction. The Necron codex was already such an abomination of fluff that further leangths taken with additional fluff abominations would be, well.... weak sauce. Some of the suggested rules changes sound good though i am not so sure i would agree with allies because, as other posters have suggested, each army "should" have a weak point.

Nagashek wrote:So... in your view there are only two options? Peace loving Hippies and Mindcontrolling megalomaniacs? Because that's how you are framing your response.

Well, yeah. I mean, 40k is a setting of extremes, there's really little place for nuanced socio political disputes there. And when given the choice between hippies and mind controlling megalomaniacs, I'll go with the megalomaniacs.

Nagashek wrote:Go read up on the race, they are far more interesting than you are giving them credit for.

The thing is, darker Tau are better Tau, at least for me. It's enough that their general aesthetic doesn't fit 40k, they should at least follow the spirit of the setting in fluff.

And really, don't you feel that the way you're portraying the Tau makes them, gasp, the good guys? Good guys in 40k? Gray good guys? Space Wolves already exist, that niche is filled to the brim with beards and wolf fur.

ShumaGorath wrote:

I don't see a problem with random charge distance. We already have random movement distance for any unit moving through cover or running.

Which is awful. Random charge distances wouldn't even have the rough logic of "that forest is slowing them down".

You just need to look things from the point of view of deciding a mechanism to achieve a desirable game result and rationalising it.

For instance, just as the unit gets up to charge, the defending unit lays down a heavy pattern of defensive fire, causing them to freeze. Or they get the order too late.

Let me know if anyone wants a hard copy of the "pancake"rules let me know!

Kroothawk wrote:

His Master's Voice wrote:The current fluff almost directly states the Tau brainwash themselves and pretty much any subordinate race they come in contact with. If the Imperium is dogmatic, the Tau are a cross between Hitlerjugend and Soviet re-educational camps.

Because Hitler and Stalin were famous for ending bloodshed and teaching peace and the value of life, riiight!
Let's just say you believe unbacked posts by Tau-haters more than the explicitely expressed intention by the designers of the Tau race.

The Tau can talk about valuing life until they are blue in the face (no pun intended) but they still bully weaker races into submission (like Hitler did to Austria), and they still choose to war against any other races that oppose their 'vision' of a utopian galaxy. Sounds a lot like Hitler to me.

His Master's Voice wrote:Right, because if you decline following the Greater Good, the Tau leave you be.
No, wait, you get a railgun round to the face.

Here the answer taken from the Tau entry of the BFG rulebook:

BFG rulebook wrote:There are other races still who do not wish to fully submit to the Empire, but who likewise have no wish for war with the Tau and will instead strike up armistices or treaties of neutrality, opening up lucrative new markets or providing new allegiances for mutual protection.

His Master's Voice wrote:So what you're saying is that someone involved in the design of Tau said they're peace loving hippies? Seriously? Can I get a quote on that, because as much I thought it impossible, I might dislike Tau even more now.

Here the quote:

Original Tau designer notes wrote:In contrast to other races, we wanted the Tau to be altruistic and idealistic, believing heartily in unification as the way forward. This meant that they would happily incorporate other races into their empire without subjugating them, instead enticing them in with the benefits of mutual protection, trade and technology.

His Master's Voice wrote:And really, don't you feel that the way you're portraying the Tau makes them, gasp, the good guys? Good guys in 40k? Gray good guys? Space Wolves already exist, that niche is filled to the brim with beards and wolf fur.

And the niche of the bad guys in 40k is still vacant?

The thing is, darker Tau are better Tau, at least for me. It's enough that their general aesthetic doesn't fit 40k, they should at least follow the spirit of the setting in fluff.

I love when people bring this up! I mean back in the days when the emporer was just asleep, the fluff wasn't so grim-dark (except the space marines, who were psychotic killers) and with all the various fluff changes to make everything more grim-dark.

The spirit of the setting has changed far, far more than people seem to know.

Good guys in 40k? Gray good guys? Space Wolves already exist, that niche is filled to the brim with beards and wolf fur.

Hahahaha, space wolves being good... That is a good one! They are at best, neutral, considering they are the MAIN reason an entire faction went chaos for their tactics.

Kroothawk wrote:And the niche of the bad guys in 40k is still vacant?

You wouldn't squeeze a pin in there.

And yeah, that quote is why Tau always felt wrong to me. It's like putting a mild mannered sales representative in a facility for the criminally insane. Amusing for a while, but shouldn't last long.

ZebioLizard2 wrote:The spirit of the setting has changed far, far more than people seem to know.

For the better, I'd say.

ZebioLizard2 wrote:Hahahaha, space wolves being good... That is a good one! They are at best, neutral, considering they are the MAIN reason an entire faction went chaos for their tactics.

They sing a lot, laugh, drink till they get stoned and keep pets (the size of trucks but whatever...). That's as close to being good as you could and should get in 40k.

Aaaaaaand I was kinda joking there anyway...

Making the Tau into the Anti-Chaos Messiahs of the universe just seems strange and borderline Marry sue to me.

I like the current idea of the Tau being the young and naive "youngsters" in the galaxy. The fact that Tau don't know about Chaos and think that Chaos is a myth that the older races of the galaxy use to try and misdirect them and "keep them down". They don't know how physic powers work, but see them as nothing more then a strange phenomenon that can eventually be explained. I remember reading fluff that the Tau don't even really get mutation from Chaos in origin. They have fought the Imperial Guard before and have seen 1st hand the Abhumans and the huge verity that humanity comes in. For all the Tau realy know, mutations are just another expression of the diversity of humanity.

In a way the Tau are interesting when you think of it, because to them humanity and it's struggle ageist Chaos is the "strange and alien thing". I know people who don't really "get" the 40k universe and have a hard time wrapping their head around the whole concept of how humanitiy could be in it's current state in the 40k universe. (They like their stories of humans over coming their weakness, not so much the story of the worst that humanitiy can sink to.)

For them the Tau are more human and relateable then the humans of the setting. lol

If they are keeping that aspect of the tau fluff, but then turn them into the "Anti-Chaos Messiahs" not only cheapens the concept of Chaos, but even the fluff of the Tau.

Personally I'm not a huge fan of the Tau, but I get why they are their and why people like their fluff. They do have a place in the setting, and they fill it in a very creative way. As for the Tau being "incorruptible"? I always understood it more as the fact that it's not worth a demon's time to corrupt a tau. If you have the choice between a Turkey Dinner (Human soul) or a Handful of Salt Water Crackers (Tau Soul) witch would you choose?