I agree, I just played for an hour or so in a 4 man public game and I was astounded at how quickly elites went down. Yesterday it was taking roughly 20-30 seconds for me to kill a pack on T3, in that game it took around 5 seconds. (I will admit the group did synergise well, but not so much that it would bring kills down to 5 seconds...)
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Level 60 for what it's worth.