While I was 2-boxing my shamans, I was thinking about how much exp I was earning. I was arguing with my friend which would be faster: 2-boxing, or leveling one of the guys to a level, then the other. I just want to know what everyone thinks would be better.

2-boxing will let you kill faster and get quests done faster, but you get less exp and run out of quests quicker. Which do you think is faster?