Originally posted by Emelio Lizardo:

What, we're supposed to do, fight toe to toe with these things?

Aye, I believe the intent is to force people to learn to dodge-roll.

That being said, it's fairly easy to go into sneak while outside, walk left/forward until you can see the troll (all troll caves are the same layout), shoot the troll in the back with a fire arrow, and run back outside.

Wait 20 seconds for the troll to drop aggro and move away from the front of the cave, then lather, rinse, repeat.