I'd add a fast chopper helps too for buffs on basic and all uniques Omega level is a must. Chopper getting the extra assists was the key for me to get 7* thrawn but I was pretty much at your levels to get him. Strategy on last level is key, DT first, then the other troooers, leave thrawn last.Once it's just Thrawn,use Zeb stagger to help with TM manipulation and taunt with chopper or kanaan when Fracture is due and the use Hera last chance to save that taunter. Will take a few tries but after enough tries you can get it.