Vault of the Incarnates - Terros Solo (Mythic)

Difficult solo for current gear levels but this will be pretty trivial by 11.1 and 11.2.
More of a survivability check than anything else - the first initial hits of the berserk cast while you still have 16 stacks of the tank debuff hit VERY hard and require cooldowns to live through for now. Beyond that as long as you are able to survive and sustain yourself through 99 stacks of the berserk debuff you can basically take as long as you like to finish him off!