Quote Originally Posted by Nora_of_Mira View Post
my last group fought him for 20+ mins so I do not believe (in god) there is any sort of DPS check.
The only DPS check is after the math, with the add phase. If you don't kill those fast enough to be able to escape, he wipes anyone still in the portal. If most of the group survives the math phase and a few people have the success buff, it's not a hard check. Woe be if half your group is dead, though.