Go someplace that was hard 5 levels ago. The Hunts are good for leveling because they give you a goal, which can mitigate the boredom of just hitting wolves for 2 hours.

I used the Sandsea, and then the Henne mines until I could one shot most of the monsters because the drops were decent.

I don't recomend the the Zertinan Caverns (in Ozmone Plain) unless you want some stories for the funny death thread.