Hell drakes are less scary against erminators because they still get their 2+. The
LRC should keep your guys safe if they show up. I'd recommend putting Azrael in the
LRC maybe? That way that whole squad has
FNP and a 4++. Maybe put the librarian with the devastators to give them prescience, and find points to add a PFG so they also have a 4++? Basically, those Hell Drakes aren't getting through your armor so easily
I think you could definitely drop one of the dreads to get those extra points you need too. Then if you can proxy and
ADL for the
devs to stand behind that might not be a bad idea. Use the sergeant, librarian, or one extra dude to man the quad gun and take down flyers with ease.
Could drop another dreadnought and get more tacticals on that squad or more terminators.
Overall, I think you need a few more scoring bodies. Dreadnoughts are OK but if he is running 3 oblitereators squads they are going to get ... ahem... oblitereated

I would try and cut out at least one for that
ADL + PFG and stick the librarian in front. Or have him bounce around with the terminators.
Another thought is using the banner of fortitude (cut the apothecary) on the command squad. It is damn expensive, but if you deep strike in a squad of terminators alongside them you will have a 4++ bubble
FNP plasma death squad accompanied by 5
TH/
SS FNP terminators... yeah... that's gross haha. And better yet, immune (mostly) to those Hell drakes. Send that squad after his demon prince, who won't want to be flying based on the flakk squad and
ADL idea. As soon as he crashes, plasma all over his face and charge with
TH/
SS FNP if necessary.
- VardenV2