i did it at literally 120 you need to relax, p2 and p3 and p4 are literally just a dark souls patience tester, you have a whole hour
hide when you must, burst when its safe, look at your iframe and hero's will cooldowns, dodge the white curses and if you get white cursed anyway dont panic just dodge the black curses for 5 seconds or so until its gone
you are overgeared for this