The formatting made this a bit hard to understand, but I think I got it.
Ok, point by point.
Rule of thumb with Librarians: Take Shield of Sanguinius, and any one other power. If you're not running chaplains, use Unleash Rage, and if you're running chaplains use Might of Heroes. So in this case, Unleash Rage and Shield of Sanguinius.
Razorbacks aren't assault vehicles, so strip the razorback squad naked and use those points for other things - keep them embarked for the entire game, or deploy them separate to babysit your home field objective(s). Otherwise, your 5 assault marines with bolt pistols will be shot full of holes the turn it disembarks and won't get to do much of anything at all other than give your opponent a target of opportunity.
Take power
fists in your assault squads - sergeants are awesome like that. They can't be singled out in
CC, so they're the only things in the entire codex that can safely use an initiative 1 weapon. Otherwise, if you insist on power
weapons instead, take lightning claws. Two of them, preferably, but even one of them is a slight upgrade over the
PW, for the same exact price.
I would also take 2 flamers and dual lightning claws on each of your RAS instead of 2 meltaguns and a
PW. Not only does it specialize the unit (which is the best way to make it effective - jack of all trades units generally underperform in each of the roles you've equipped them for), but it adds some much needed horde control.
For the Stormravens, keep the twin-linked assault cannons. They're great anti-troop weapons, and statistically they're better at popping armor than lascannons. Basically, 4 twin-linked S6 rending shots beats a single S9 twin-linked non-rending shot. The mathhammer has already been posted here (I was about to run it myself when I decided to search):
http://www.dakkadakka.com/dakkaforum/posts/list/274015.page
You did good with your
DC Dreadnoughts, although I completely, 100% disagree with you on the
DC Marines. Rage on the marines makes them useless, but rage on the dreads is manageable
as long as you take magna-grapples.
The Furioso Dreadnought definitely needs extra armor.
I'm of two minds as far as heavy bolter sponsons on the Baal predators are concerned. If you can afford them, then they're generally worth taking, but those are always the first things to go when I'm looking for points. Heavy bolters are very unimpressive weapons.
Here's a list with my suggested tweaks in it:
HQ:
Librarian (Shield of Sanguinius, Unleash Rage)
(100 points)
Librarian (Shield of Sanguinius, Unleash Rage)
(100 points)
Elites:
2x Sanguinary Priest
(100 points)
Chaplain
(100 points)
Furioso Dreadnought (Talons, Magna-grapple, Extra Armor)
(155 points)
Fast Attack:
Baal Predator (
TL Assault Cannon, no sponsons)
(115 points)
Baal Predator (
TL Assault Cannon, no sponsons)
(115 points)
Baal Predator (
TL Assault Cannon, no sponsons)
(115 points)
Troops:
9x Assault Marines (2x Flamer)
- Assault Sergeant (2x Lightning Claws)
(230 points)
9x Assault Marines (2x Flamer)
- Assault Sergeant (2x Lightning Claws)
(230 points)
10x Death Company (2x PWeapon, 1x THammer)
(260 points)
Death Company Dreadnought (Talons, Magna-grapple)
(140 points)
Death Company Dreadnought (Talons, Magna-grapple)
(140 points)
Heavy Support:
Stormraven Gunship (
TL Assault Cannon,
TL Multimelta)
(200 points)
Stormraven Gunship (
TL Assault Cannon,
TL Multimelta)
(200 points)
Stormraven Gunship (
TL Assault Cannon,
TL Multimelta)
(200 points)
Totals: 2500/2500 points, 8%
HQ, 14.2% Elites, 13.8% Fast Attack, 40% Troops, 24% Heavy Support, 44 Models, 17 Kill Points
Run the
DC marines + chaplain in one 'raven with the furioso, and each of the other 'ravens gets an assault squad, librarian, and priest along with a
DC dreadnought.
Outflank the Baals and try to use them to pop vehicles from behind.
Basically, by adding a librarian with unleash rage and a priest to each assault squad, you turn them into a mini-death star (especially with the flamers and dual
LCs for anti-horde). Shield of Sanguinius will cover the
DC stormraven, in the turn that you want them to finally disembark. Otherwise, abuse the 4++ cover save for flat-out movement while you position them.
That,
IMO, is a moderate improvement over your original list, while still keeping the "feel" of it intact. You've got a highly mobile force capable of popping a
lot of armor and I've added quite a bit of horde-killing to boot. Mephiston
would be nice, I agree, but in this case I think taking 2 librarians instead would be the better choice.
Consider each assault squad with a libby and priest attached:
37 attacks on the charge, rerolling misses, 4 of which are force weapon attacks and 4 of which are power weapons that reroll failed wounds, all at S5 I5, plus 2 flamer templates landing right before the charge.
I'd say that tops the assault terminators (standard setup is 3x
TH/
SS and 2x dual
LCs), which get 17 attacks on the charge, no rerolls, only 8 at initiative (rerolling wounds) and 9 at I1. They also only have a 17% chance of being
FC (so S5 and S9 respectively), and don't have
FNP. It also tops Mephiston.
This is a sneaky list, too - your
DC stormraven (make sure to paint it in the
DC color to make it stick out more) will be absorbing all of the fire when the
true threats are the other two that are loaded with "Just Some Regular Assault Marines".