Boba? or Bossk?

I’m trying to farm BHs.

I’ll make chewie event squad w/
Boba bossk Cadbane Greedo Dengar.

Boba: G12
Bane: G9
Greedo: G9
Dengar: G8
Bossk: G1
This is my gear.

What is the limit gears to unlock 7*Chewy?

I’ll give them all omega..
And I’m willing to invest 20 zeta mats for BHs, but I don’t know which zeta is the best choice... Boba? or Bossk?

And whose leadership is the best? Boba? or Bossk?