barriss is best with gk, his leader gives jedi and clone allies +70% defense and +30% max health, which makes barriss' zeta heal restore more health than they take damage most of the time, unless you have heal immunity or a g12 cls- raid han combo her and gk are very difficult to kill, as they just heal whatever damage you deal to them when you crit them... nihilus is great vs them tho...