Diran D`Tradis  

Around 17 millions HP, will spawn Diran's guardian based on % of his life (something like 75%, 45%, 5% from my own experience), that need to be killed so you can dps him again. He's INVULNERABLE as long as a guardian is alive.
Can be slowed, and adds can me mezzed / slowed.

Emotes for spawning a guardian :
Diran D`Tradis calls fourth a loyal guardian to bolster his defenses.
Diran`s guardian's glow with unnatural intensity as it pursues you!

Guardian hit for around 10k and cast Harm Touch.

Other than that, it's a much more easier fight than the Shirik's constructed guardian from my point of view.
Mainly a tank / dps fight.