If you're going the harly route maybe drop the Incubi and just take Harlies with Embraces, they're just 3pts more and have access to shooting, Fusion Pistols, and Rising Crescendo. You could dump the Incubi and Kabalites for another unit and trade the Venom for a second Starweaver.
I'd dump the Reapers altogether and take another flier or a Ravager to help with your AT.
I realize the Incubi are there to maximize the Tantalus' value, but unloading 10 Wyches from it is hardly scary. I think the list should either have lots of Harlies in Starweavers or lots of Incubi in the Tantalus. Focusing on one or the other should help focus the rest of the list on being able to take out mech.