The staff mats aren't that hard to farm. I decided to do it one night and the only thing that took me more than ~5 tries was the item that comes from the cave in A3 (Liquid Rainbow i think). This took me about 2-3 hours to farm only because 1. the cave is one of 2 instances that can spawn and 2. you then need a rare champion to spawn but you have to clear to level 2 first. The good thing is that it can be done on normal difficulty to speed up the clearing at least.
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Is this turned on in the UI options somewhere? I look under their names and don't see anything but the colored healthbar.
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