The Heretic Among Us

SPOILERS!

I'm on this mission at the moment. Level 41 Marauder/Warrior. I've done it 5x now and keep failing because the stupid NPCS (especially Drillemont the Honest) like to go all Leeroy Jenkins on Guillaime in dragon form and die (he does that move that knocks off a lot of HP). If I don't get the wyvern that comes a little later and kills the one NPC that cures everyone I definately lose. But they all like to stand in the aoe circle like idiots.

Anyone have any good tips on how to defeat this mission? I'm getting real sick of the cutscene.

EDIT: Wrong forum ignore this.

I engaged the ads as soon as they arrive to take away aggro from NPCs. Face them away from the NPCs to avoid AOE hitting them. I did it as Pugilist and it wasn't that hard. Still failed first time due to NPC dying like you said.

killing the adds first is essential(like always) drillemont won`t die as long as the healer guy is alive, the problem is that the last 2 adds will get him killed and drillemont soon after