That looks pretty darn strong. You have a warlord that is going in one of the venoms I assume? Or will he just sit and hide on the skyshield?
Your problem will be flyer heavy lists. You have no real answers to three flyrants and two hive crones or to daemon flying circus. Otherwise it seems solid. Eight ObSec units should be pretty good.
_________________
Dear GW,
Paper is overpowered. Scissors is fine.
Signed,
Rock.