This is what i have in mind...
Hive tyrant
Devourer, devourer, old advesary, wings,
2 hive guard
2 zoanthrope
10 gaunts
10 gaunts
tervigon
tervigon
20 gargoyles
5 warrior shrikes each with bone sword lash whip and scything talons
trygon
trygon
main idea is to have the hive guard gants and tervigon stay back and hold objectives or what not and have gargoyles lead the winged creatures and trygons to battle. Old advesary to all of my units within 6 inches and just lock into assaults asap