Its Going to be tough without dengar but should be doable. I would save gear and a single zeta for Bossk and gear for Boba for g12. The rest are fine.
I ended up having to take Bossk and Boba to g12 and put a zeta on Bossk lead... Then I did it 3rd time I tried with Boba lead at g12.
At least for me I figured the the enemy hits so hard Bossk lead isnt really going to save you but for an extra hit or so. The extra Burst from Boba is what won it for me. But you can do it with either lead. If you use Boba get everyone over 200 speed and 75% potency.
Good luck!
