[Sheya]

Well in my experience there are only a few mages who I have had trouble with and that was when I was in my early 60's tanking for lvl 67+ pure int mages. But as my skills got stronger and as i perfected my timing for each particular situation there was very few or no casualties. And usually the few were by the mage attacking before I even got the mobs together.

Also your armor has nothing to do with how well you hold aggro. It depends on how much damge you do or the timing of your skills. Which Pure end have to depend mainly on the second one.