2 options:
A. Deny Bossk taunt and focus the sides -> this will be able with TM advantage teams - JTR+BB, keep bossk abi blocked by JTR, FO KRU double-turn stun on bossk (you have +30 speed from L), ImpTroopers fast kill before he taunt (you get +20 speed from L), any team with Thrawn faster than bossk.
B. DPS your way through it. that means, let bossk taunt, just have BIG damage to deal with it, usually with % HP attacks - Zader L Dot stacking, JTR team - again- for exposes, zFinn high potency team, machine-gun exposes (Leia, C3PO +1) the +1 i recommend Paploo, for his ewoks bonuses near c3 and tankiness.. many would suggest Ackbar. and Aco+Zomb cheese with nute L/Leia L.
for case B, remember that when Dengar is stealthed, toons like c3, leia, and acolyte cant be stealthed. so dont hit dengar if you are using them - first Bossk, then the other one (boba), then, in the end, dengar. when the stealth doesnt matter.
good luck.