Is there any way of making an NPC (in this case Barknar) into a hunter and hunt at a specific time of day in an area or patrol?

Faendal is meant to do this at 4am but only exits his home, walks to his xmarker and stands there doing nothing even if you spawn prey for him.

I've tried other methods, AI packages, templates etc and can't get this to work. There's plenty of help making a guard but a hunter who works only part of the day I can't find anything.

Just look at how the vanilla hunters are setup and go from there.