So the boss is essentially a DPS race? That makes sense, we got him down to about 10% once when he wiped us.
Think hes bugged though, his enrage timers were all over the place.
It's not exactly a dps race, it's about getting lucky and forcing him to "reload" (summons droids) before he enrages, that way you can burn him down without much worry.
An enrage timer would be really helpful here.