You seriously do not have enough time to get back to a guardian before this guy one shots you. He drags you to him. Then is you don't immidiately locate the right guardian and run to them its already over your dead. This thing is seriously frustrating. And if that does not kill and you happen to make it to the guardian he is spamming spells that do 1000-2000 hp damage at you. You can't block them I don't believe unless I am missing something. So with my 17K of hp it takes about 8 hits even if I can make the runs to the guardians.