Uh, no you don't. Rotations for leveling are vastly different from those at endgame. Example, do you know how many times I've seen pallies specced into Ret that think they can tank? Or Druids wearing healing gear who think they can dps in cat form? Or mages that thought they should just spam Ice Lance? I've never leveled a druid, but I could find icy-veins and figure out how to dps with that class. And, as a hunter, I've never bothered using Bestial Wrath during the leveling process. Or Rapid Fire. Or any other CD. In fact, I don't use Serpent Sting either. I spam Kill Command and Arcane Shot until Kill Shot shows up. If I actually have to regain Focus, I'll use Cobra Shot. Why? Because they die.