He had a void burn then arc stage using different burns had bonus dmg

I didn't notice the energy weapons dealing additional damage to the boss. Ran double HCs to test it. Seemed to hit about the same. But even if they made that a big factor, it would still feel like you have less weapon variety to work with since most people I've played with have their one favorite primary type and usually one they also sorta like. Personally I try to play each character different using the primaries that I think fit the class best. Just think there were better options to accomplish the same goal.