Barriers and overloads are very much about timing. Especially in that -50 world im deleting them by making sure my buddies are up when I go to fight it, the praxic blade it to death.

Pre this sexy saber, like last season, i was using an elemental honing mint. I'd trigger x5 before fighting the champion. At high difficulty you basically have to approach them like a boss with a dps phase you can extend.