zVader HAAT Phase 2 advice...does Luke have a spot?

My guild is struggling with P2, so I'm considering putting a zeta on Vader...I have the core team decently high gear (Vader G10, Phasma G10, Sidious G10, Boba G9, Ewok Elder G10) HOWEVER I don't even have Tusken Shaman unlocked yet...

A couple questions:
1. Can Farmboy Luke serve any purpose at all? Is there a video anywhere of someone running Luke with Zader? He is my only maxed character (yeah, I know...) so I'm very curious about this...
2. Gamorrean Guard? I mean, I get it, he sucks. But can he be used anywhere?
3. Does Sidious have to be zeta'ed?

Would this squad be able to score reasonably well (1.5M-2M) with good (not God) mods?
-G10 Zader (L)
-G11 Sidious
-G10 Phasma
-G11 Ewok Elder
-G11 Luke

EDIT: It has also been suggested to use Yoda with zeta'ed Battle Meditation to mitigate damage with Foresight and Tenacity up. Any experience with this?

Thanks!