I first switched to barb, after that to crusader.
Barb perma dies to guardians in high GRs, crusader is just doing fine
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your mitigation is pretty good. But is the bot really using the guardian turret?
if you wanna go high GRs, dont use dh.
the bot is only good if you are able to facetank everything.. a dh simply does not have the neccessary dmg mitigation