Rift Mob:Dichrom  

Expert

Easy tank and spank fight. He will knockback the tank. Other then that just stand in the center and avoid the lasers and you should win.

Master

Periodically Dichrom will become shielded and an Entropy Vent will appear in the middle of the lasers on one side. Dichrom's ward must touch the Vent to destroy it, so the tank must drag him to it through the lasers. You can range DPS it down to 1hp but it will not die.