Breaking his bar is counter productive anyway because that's the easy damage phase, he doesn't move and easy to avoid damage, breaking his bar will only get him chasing you again with bigger damage faster.
This drm/boss CM is just annoying. The projectiles that freeze you during the elite boss are just lame, and the elite damage is to much imo, they deal more damag than the actual boss ...
And seems like i'm getting alot of laggspikes when i'm at this boss, even more then average, kills me more than anything.