Just working up a small list (my first list) that is tough-ish but not overwhelming. Let me know if I'm on the right track or not:

Hive Tyrant - 213pts
Wings, 2 x ScyTal, AdG:I, AdG:WS, ToxSac, ImpAtt, FlHooks, Warp Field

Broodlord - 288pts
ExtCar, AdG:I, Tendrils, ToxSac, FlHooks
Retinue - 8 Genestealrs, ExtCar, ToxSac, FlHooks

4 Warriors - 138pts
EnSense, ExtCar, ToxSac
4x ScyTal, 3x Spitters, 1x Strangler

8 Gaunts - 72pts
Fleshborer, Without Number

8 Gaunts - 72pts
Fleshborer, Without Number

6 Genestealers - 114pts

Heavy Support
Carnifex - 188pts
EnSense, ExtCar, ReChitin, VCannon, Strangler

Carnifex - 153pts
EnSense, ExtCar, ReChitin, 2 x TL Devourers

TOTAL - 1238pts

C&C welcome!