I'd run a Combined arms detachment with:
4 x 5 kabalites in venoms = 420
3 x 5 scourges with heat lances or haywire blasters = 360
Then I'd consider corpsetheif claw, which is 5 talos in a unit, coven formation. The jet bikes are good, so maybe take a team of scourges out for them.
Probably run a lhamean or medusa as an HQ to save points
Incubi can be good, but that's controversial
Edit: with ynnead coming out, you might be able to use less efficient units more viably.
“No. Stop. Don’t go in there. You’ll all be killed,’ Motley murmured sardonically”