Spam Blood Boil if you hadn't figured that out yet.
Most effective in dungeonleveling.
(Maybe not as strong as in Outland.. but it's probably still your strongest move)
I, myself, prefer to level through dungeons as a tank. Sure it's a bit of a grind, but just keep thinking of reaching the next level.
The mob exp combined with the dungeon quests get you there quick enough.
At level 80 I just do quests, making sure to keep in the highest possible zone.