What I do is I quest all the way to level 30 or something. In between quests I train in Stranglethorn Vale.
If you kill mistvale Gorillas(level 32) ...
Bio: Name: Aarallo
Realm: Stormrage
Class: Combat Rogue
Level: 26+
Weapon(s): The Butcher (MHSw), Sword of Corruption (OHSw), Heavy Bronze Darts (thrown)
Highest Crit: 205
Highest Ability Crit: 312