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Since I just received my battleforce this weekend, I decided to see if I couldn't play a game or two with it.... since I don't plan on buying anything else until most of this stuff is painted.
3x Warrior : Rending Claws, Scything Talons, Leaping, EC, Adrenal: +WS
6 Genestealers: Extended Carapace
Carnifex: Barbed Strangler, Venom Cannon, Ehanced Senses
Total 499 points
There's not a lot of breathing room here, considering the model limitations. After this, I'll be getting a (flying) tyrant, and another box of gaunts at least... as well as slapping wings on my warriors. I might even be able to squeeze in room for the 3 raveners (and my other 2 genestealers) I have in a 1000pt list... who knows.
Well since your basing your army so small the only thing I can tell you is that you can drop the upgraded WS on your warriors, they rely on rending, other wise they're hitting easily enough.
And if you wanted to you could bring your army up to 600pts by putting in those extra two genestealers, put the rippers in and give them leaping and give your carnifex reinforced chitin, so he lasts a little longer.
Legion Of Everblight: Abyslonia
Protectorate of Menoth: Grand Exemplar Kreoss