I can't get online due to some network issues my router has, so I'm stuck playing solo...not that I mind. :)
However, it gets a big draggy having to do all the quests and whatnot for each character, so I was wondering if there were any good ways to speed things up? So far, the only really good place I've found is the Lost Cavern for levels 11-20 or so...you can crit the crabs in there really easily, and they all spawn right in front of the cave entrance.
If you have another controller, make a new profile, splitscreen, powerlevel that character by killing high level mobs, when the desired level is ready, use the temporary character to level your profile's characters.