There is in exploit my friend found out (so he claims) whilst playing in Heroic Magister's Terrace, fighting Vexallus (2nd boss)... many people may already know that Vexallus spawns adds, that release a de-buff onto the person that kills them, this de-buff stacks up causing super damage, the more the de-buff stacks, your character will become bigger.
If you stand where i am in the picture seen below (near a lamp... i think this only works for gnomes but im not sure, i couldnt show with a gnome because i dont have a gnome char, i also presume it might work for dwarves). The lamp will block you from getting bigger as the debuff stacks so therefore the debuff will be dispelled after around 0.1 seconds, letting a chosen candidate take out all the adds without problem.
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