Keep trying? At your strength you really need things to line up a bit. Get the taunt off of the storm trooper, dispel the buffs on the death troopers ASAP (Zeb's special will clear it even though it's not a cleanse, which is a great help). Try to keep Kanan's offense down on Thrawn, and kill the death troopers first. A lot of people say kill the stormtrooper next, but I didn't find him nearly as dangerous as the healers. At the end it was Zeb, Chopper, Hera vs Thrawn, and it still came down to the wire as Thrawn dispatched Zeb leaving me with almost no damage.
