I was powerleveling 4 toons with lvl 70 mage but ZF have become pretty tough (because of trolls healing each other). Why cant you gather big train there? Just mount up and run all over. Well if they heal faster then you damage them... it sucks :P

Actually you can AoE powerlevel up to lvl 50 in ZF then ST but after... hmmm that sucks big time. I have lost 2 days aoe grinding in BRD and decided 6 hour per level is crap and now questing 3 hours per level.