There is a Quest "Kill Iyu"....this is 3. step of a series
Iyu - Quest - World of Warcraft
Dont´ kill him and u can level up all your supporters very quickly....
My video....
https://www.youtube.com/watch?v=LDNPs64HwgA
I dont know if the enemies gives u XP....because i was 100 already.....
Maybe someone will give it a try....
greets