The problem for essences is that there are a handful of good ones, and a bunch of junk ones. I ran out of skirmisher a long, long time ago - and my apologies, but I'm not spending hours farming so that I can get enough for 3 more runs when I'm already 4/15 towards my 5th relic and I'm 95% just fishing for the absolutely abysmal chance at getting the hairstyle to finally drop.

My essence is the uptime you get out of me while I'm DPSing when everyone else is hiding in the corner on gunner, running around like idiots while the soldier is playing the shell game, and continuing to hit the bomber because trust me, you really don't need to be out of melee range standing dead center on the bomb to not get hit. Really, you can keep hitting the thing.