The shell looks fine to me but I feel its stretched a little thin. A bare archon really makes me wonder why bother. Heres some ideas..
-give the archon some kit, either blaster or combat kit. Otherwise lose this guy for a lhamaean. If you've been gone for awhile then maybe you aren't aware that a court is a legal hq selection. I usually still prefer a proper hq unless were playing dirty and I'm completely min/max.
-incubi absolutely need a klaivex, hes the best part of the whole unit.
-ravagers my gut says go all one weapon type. I've toyed with mixed but I just can't see how that pays off. The weapons are too specialized. Anyway if you've had different experiences then cool and I'm all ears.
So to find pts for some/all of this I would suggest losing a warrior unit and taking the venom in fast attack empty. The blaster could be relocated to the archon if your worried about it. Of course taking a lhamaean or even a single medusae in venom would buy you most of the above too.