Step1- lock down bossk
Step2- kill non dengar member. Twice if a fett
Step3- kill bossk
Step4-dengar time
In my matches (whatever bracket 2.2 mil gp is in) I can usually use one of the better attacking groups (CLS, Han Chew or something with Thrawn) and still have enough roster for the match.
I use Bossk, Boba, and Cad on my front line. Cad g11, others g12. This round, the team took 3 attempts to take down. Round before, 3 attempts and the team held and stopped anymore attacks. The first round, it got taken down in one, but the guy ran out of resources and took three attempts to take down Sidious, Scav Rey + RT