Originally Posted by
Rafear
There is a big difference between aff lvling and demo/destro lvling under lvl 50 in terms of downtime. Aff has almost no downtime since you have mana from drain soul, and healing from corrup and so on. Demonoly is better after 50-60 because you can solo most thing. Destro I've never used for lvling, i've heard is fun and after some lvl you can kill mobs very fast one by one. I prefer demonoly after lvl 60 because it's tankier, has awesome aoe and can solo most things. Pick what you wish but until 50 i'd suggest you go affliction with 8 points in demo(or void won't keep aggro).
Best of luck!