i remember some guy said it has to do with the waves, if ur little low lvl u get most xp from first waves only, and later on u get most from last waves... dunno if thats true
i honestly think that after you id say lv 95 there has to be a better spot than baal runs. i dunno if anyones experimented with this but 600k for a 5 min run at lv 95...not very much.. how much exp do cows give at lv 95 and if cows are bad what about bloody runs.. i dunno i just think there HAS to be better exp somewhere.. its almost like pindlebot will level you just as fast as baal runs once you hit a certian spot..
It's hard to find one that actually goes anywhere. I usually will join Duel games and clear The Pit for experience, if I have a character that can do that.