Hmm dunno if I understand this correct, but do you solo Karrundax or playing in a Grp, cause you are saying something about leaving mobs for a gwf? If you do it completly solo, how long does it take you to clear it? Do you have a video for us to see how you do it?
I'm pretty sure it's because some mobs randomly attack and if you're unlucky, you'll take some hits. Also you could take some dmg from casters and aoe spells.
Thx a lot and nice work, forgot to mention that! So I'll give it a try and wanna start to farm a T2 instance, which one would you recommend to start with and how long does it take you to clear? I think you should leave the most trash, don't you?