My shamans are now 70 and 4x47. I've been doing a mix of ZF/Maraudon, mostly becaues I cant stand one or the other for too long. I also looked for all available quests that didnt involved a long chain prior to get them and did them as well, a nice exp on the side.

Exp is long in instance, but also other factors are to be considered, like money and loot. Buying skills for all 4-5 toons cost alot of money and the mounts too, but regardless of that I'm making tons of cash, cant wait to get to Lv. 70 and see how it goes that way.

Just have to keep on grinding, been playing and hour or 2 everyday, trying to do at lest 75% of a level now and then, eventually I'll get there.