What I'd do with my warrior is invite some random pug to get boosted as well. Then I'd put my boostee /follow on that guy while I mow down everything in the dungeon. it has the added benefit of someone else doing the looting. My loot policies varied but were typically "I get superior or better unless you can use it". Picking up the blue and purples along the way made for some really good cash as a lot of them sell really well to twinks.

I was boosting with a warrior, so a shaman will probably be a bit slower but it's a damn sight faster than solo questing.