Another endurance check that hinges on the availability of your Mindbender. Since face tanking this boss for extended amounts of time is not feasible, there must be some kiting involved at some point, and the only way to do this is via an aggro dump using Mindbender.
Basically when Mindbender is active, Fade then run as far away from the boss as possible. This kiting strategy not only buys time for HoTs to replenish health, but also minimizes face tanking the boss. This strategy is similar to the only used against Toravon
The boss's damage is quite severe but it is not recommended to Flash Heal unless there health is low and all other healing spells are on cooldown This due to its expensive cost as well as cancelling shadowform. Make sure VT is on boss at all times or else mana will deplete even faster.
Overall the basic strategy is to Mindbender + Fade, kite boss for as long as possible while refreshing dots. After kiting, start DPSing boss while using all heals and shields available except for Flash Heal. When all these heals are on CD, and health dips low, start using Flash Heal until Mindbender is up again and simply repeat the process.