IPD wont kill a full health Bossk.
Ive beaten him with zFinn but that is Risky because of the tenacity bonus. JTR and CLS is overkill. Jango or Embo lead +Cad and Greedo will probably work because of Stunlock and big damage. Properly geared Vets would work for the same reason but most dont have them geared that high.
The two ties I tried with Thrawn didn't work. He gimps your damage.