during today's round of attempts on Thaddius, fire mages getting credit for ignites were routinely pulling agro early on and getting killed by Thaddius' melee. according to them, the ticks were doing between 30K and 60K damage. they were not pulling agro during transitions (i.e. runnning into melee range - we use the diamond strat anyway). i have 5/5 defiance, shield slam, thunderfury and have never before had problems holding agro on any mob/boss in the game. rage was obviously not an issue and i was timing shield slams, etc. for max stacks and made regular use of taunt.
i'm wondering if anyone else has had/still has this problem (or am i not doing something right?), and how one might go about dealing with it.
edit: by "early on" i don't mean right after the pull. i would say this occured most often just before the second polarity shift.