I've been killing rotface for 3 months and never had this problem before. But we were doing HM today and another mage popped mirror images 10 sec after the pull during heroism and he happened to get an infection right after MI. The ooze wouldn't stick to him and wandered around pretty much wiping the raid. Did any of the mages here have similar problems before?
So, what should we do? Don't pop MI at all during Rotface? We are told by RL not to pop MI until like Rotface have 25% health left. Are there any other solutions to this? Thanks.