I agree it's very hard, but if Diablo blinkstrikes (as he does), it instakills you unless you have precasted diamond skin, because it's seemingly acting like a 3-4 hit dot. Either he got insanely good at predicting diablo or it's been hotfixed. (I'd love to see a video of him doing it~)
I thought his blink strike thing only hits you if you get trapped by the cages?
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