Moved to correct sub forum.
a few ideas come to mind:
- remove crit chance mods
- bring in a toon with heal immunity debuff
- execute, annihilate, shock, buff immunity (i'll explain)
- zader, Nihilus leads
The devs have stated they want to make the game so no one team can do it all, so if you want 1 team to get the specific buffs to beat other teams, you are probably going down the wrong road.
GK helps you beat Barriss, attach your target when GK has buff immunity, he will not taunt but the target will get crit immunity, problem solved, no more crits on your target toon. Ideal, no but it can work. I do it in GW all the time.