What most people do, is they mount pull 2 or 3 packs at a time on their way to GY, dismount behind a piece of geometry (wall/pillar/whatever) and then blow it all up aoe when it comes around the corner. You might be slightly underleveled at 45, but it's one of those things where, you might have to suffer for a level or two, and then you're pulling in 70k/hr and warrior groups like mine are crying in their cheerios