Why wouldn't obliterators be addable to terminators? Seems like it's just a name change.
Anyhow, my thoughts on the list. It looks pretty good to me, overall. However, I do have to agree with Mephiston on the obliterators. Why the points increase when they lost AA and got their good combat values replaced with extra attacks? Wouldn't 75 points for the new profile be good enough? As is, I would pick more terminators for terminator formations instead (the AA was worth it previously, now I don't see why I'd take them) and would just go for something else for retinues, as obliterators cannot be transported.
New defilers are the one thing I really dislike. They slow down rhinos, they can't be teleported or drop podded, they prevent garrisoning unless they're alone (in which case they are the only vehicle target in the formation and not too hard to kill). They've lost the barrage gun and their good firefight and gained infiltration. Doesn't sound that good to me. What's the reasoning behind giving them infiltrate, anyhow? Anything background-related at all? Personally, I think a way to fix them would've been putting them as core units into the armoured company. That would've created a unique and useful formation, kind of like in Lost & Damned. Speaking of Lost & Damned, if you carry out these changes, I'm pretty sure defilers will have to change in that list as well. Leaving an expensive formation of four fragile close combatants, which are outclassed by khornite engines. And removing an interesting and useful (albeit a tad expensive) artillery unit that's more resilient than basilisks and a nasty target for engages.
And what's the reasoning behind those desecrators? An AA-tank got added in, so these guys look a little lost. Apart from that, they suffer from the exact same movement-issues defilers do, except these can't even reach combat.
And finally, the ferals. Compared to a warhound with a mega-bolter and inferno gun, these have fixed forward on their barrage weapon, do 1.66 hits in a firefight instead of 1.5. Is the 0.16 hits in firefights and the different gun (ap4+/at4+ instead of ap3+/at5+) really worth 25 points extra, or should they be given a discount?
Anyhow, other than those points, I like it. Sounds like it's time to convert some AA-tanks and maybe even taking a greater daemon would be a neat idea.
