Or, maybe, you could y'know, use tactics, teamwork, and communication, and have the healer bring the adds right next to the wookiee as the channel is going off that indicates he's about to explode? You've got 5 seconds or more to get the adds next to him. All it takes is a tiny bit of awareness ..
What part of my post says I don't know the mechanics.
I'm saying the tactic described of pulling the boss away sucks.