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What do people think the best razorback variant is for space marines? Twin-Lascannons or Twin-Assault Cannons? I know many people like the assault cannons, but they just seem like a more expensive heavy bolter with more shots and have a shorter range.

I am also curious which is the best way to load out Stormravens. I have seen many people use assault cannons however, it seems that lascannons on them give a much larger threat range.

I bought mine in 5th, long before they became good. I did not magnetise them, so I have two against vehicles (Las/Multimelter) and one against infantery (Assault Cannon/ heavy Bolter). I am so sad, that I did not keep at least one Hurricane Bolter System. I would allways use them now.

I think both Assault Cannon and LasCan are good. It belongs what enemy you are facing. As we see more and more vehicles or models with several wounds, I would say the Lascannon is the better option.

The twin assault cannon is a great high ROF weapon and is a steal for its points. The Razorback and Stormraven are both fast meaning that the shortish range is not much of a drawback.

Lascannons are very good anti-tank but since they have long range, they can be put on plenty of other units like Devastators (who can take advantage of cover) or Predators etc.

IMHO you will need both anti-infantry and anti-tank weapons in a balanced army but assault cannons work better on RBs.

TLLC is almost twice as good as an AC at killing vehicles but almost 3 times worse at killing 1-wound t4 things. AC is slightly better at killing t5 stuff without a lot of wounds too. And TLLC much more expensive.
If you only want a couple dedicated anti-tank weapons and the rest of your list is chaff like tactical marines, tllc have a place. From a competitive standpoint, AC spam is best. As it still works vs everything and doesn't have hard counters. Much more reliable and underpriced => better. AC's are good enough to work vs both infantry spam and vehicle spam. While LC don't work vs infantry spam unless you somehow get a character to shoot at. LC are only better vs t6+ vehicles. But not THAT much better to trump cheaper more reliable AC overall.

Definitely Assault Cannons on both, its cheap and does the anti-infantry job well on platforms that will end up getting close to the enemy. If you ain't got ranged anti tank from other platforms in your list then the twin las is perfectably acceptable, its just not as perfect a fit as the AC.

Twin Assault Cannons, unless they're going to be your only source of anti-tank.

Since we're on the subject, any merit to Las/Plas Razorbacks? Especially in MEQ heavy meta?

Lasplas is probably even better than Twin-las but only at 12" range. It is comparable at 12-24" range and worse at >24". You really need to get close AND Overcharge the plasma though which means having a Captain nearby for rerolls.

On the basis of this, I think dual las is probably better most of the time but if you have a Razorback that you plan on getting close to the enemy, las/plas could be worthwhile.

Lasplas isn't legal anymore.

 BaconCatBug wrote:
Lasplas isn't legal anymore.

Source?

 BaconCatBug wrote:
Lasplas isn't legal anymore.

It's in the Index so it's still legal. GW even stated that it's okay over a month ago.

There are a few options that are missing in the codex that appear in the index: why is that? Does that mean I can’t use these models in my army anymore?

While the indexes are designed to cover a long history of miniatures, the codexes are designed to give you rules for the current Warhammer 40,000 range. There are a few options in the indexes for some Characters and vehicles that are no longer represented in the Citadel range – certain Dreadnought weapons that don’t come in the box, or some characters on bikes, for example.
Don’t worry though, you can still use all of these in your games if you have these older models. In these instances, use the datasheet from the index, and the most recent points published for that model and its weapons (currently, also in the index).
They still gain all the army wide-bonuses for things like Chapter Tactics and can use Space Marines Stratagems and the like, so such venerable heroes still fit right in with the rest of your army.

Either way the Las/Plas is actually isn't that great due to the wording of the twin-plasma. It doesn't take a mortal wound, BUT the model is slain and removed from play if it rolls a 1.

I plan on running twin Assault cannons on most of my vehicles that can run them. They're pretty excellent for volume of fire. I hope to be running one to two Storm Ravens and possibly two Razorbacks (depending) in my eventual force. We shall see of course.

I find that lascannons need to be brought on Infantry more often than not in this edition. They're expensive, and to make the most/best use from them they don't need to be moving as much and by extension hitting less often due to being heavy weapons. I'd much rather infantry carry them and deploy in cover to hunt big stuff from the backfield while stationary. Of course I do like the Lascannon Predator as well for being tougher/harder to kill at the cost of being larger and more difficult to hide.

Just my view on that. I do think the Twin Assault Cannon is superior on the Razorback & Storm Raven, but the Twin Lascannon is also a good, if only slightly less optimal choice.

Take it easy.

-Red__Thirst-

 Red__Thirst wrote:
Just my view on that. I do think the Twin Assault Cannon is superior on the Razorback & Storm Raven, but the Twin Lascannon is also a good, if only slightly less optimal choice.

I would agree with that assessment.