What is the best method to level 2 mages?

[Vyndree]

With the changes to quests and XP in 2.3... Questing is usually the best way to level. No matter how many toons, which class, what time of day, if the moon is out and full...

QFT. I leveled my shammies in instances pre-2.3, and when the 2.3 patch eventually hit I did each instance maybe ONCE for the fun of it and to wipe out all the instance quests. It's a reason why there's a huge gap in my instancing videos between ZF and BF.

After 2.3 hit with the increase in quest XP, questing is the way to go.