You can outrun him with the 1st boss power that lowers stamina drain. So you can either draw him off a good ways. Make sure he follows for awhile. Then lose him. I can't see him going back to your body after that.

Alternately use the stamina power to keep ahead of him and then turn and shoot bow. Might have to repeat 12 times. This is much better in the meadows. If Trolls are at the border of meadows/black forest, draw him into a clearing cause he will walk more straight and no trees to get in the way. You can tell when you just need to run by how loud his footprints get. Should go high stamina foods for kiting this way.

If its a bad area, just draw him off and get body after.