You could probably level most ranged classes without ever even taking damage until level 30 or so. I am sure I could level a hunter without taking much or any damage all the way to 85.Now, that's a pretty bold statement. However, seeing as how Mr. Elf has what? 10 hunters or something? Yeah, sounds about right. Anyways, seeing as how he's got a bajillion hunters, he obviously knows his class. And he's right. As a ranged class (especially one with a pet), he might be able to pull off levelling all the way to 85 without taking a hit.
So here's my challenge. It's similar to Ironman in a few ways. You'll have to be careful. You'll have to be sure to know exactly what's going on around you at all times. No dying (obviously, since dying causes a wee bit of damage). No damage taken.
Use whatever gear you want, whatever spec you want, whatever consumables, group up, whatever. But no damage. Falling damage, fatigue damage, fire damage from a brazier nearby, none of it.
Get to 85 without a point of damage, Grumpy. That's my challenge to you. And please, do keep us updated. I have a feeling such an epic feat would be a truly incredible story to follow.