I've been trying to level my 5 box combo through quests and casual instance running but I'm thinking of dumping the druid and boosting my shamans with my level 70 paladin. I think what slows questing down the most (other than collection quests) is the large amount of attention from strangers when they see a multi-boxer. Although this attention is expected and welcomed, it becomes tedious replying to the same "WTF??!?!?" every few minutes. After replying to whispers (some ppl ignore my dnd and whisper my shaman clones instead of my main too) I find myself only finishing a handful of quests when I would have cleared half the zone if I was leveling solo.