There was a post about ranking (might have been linked in the thread I forget) but as an air/offense you should be able to find a mob that you can kill for decent exp (assuming you can travel in air above) kill it, fly to healer and heal (barter healing to save coins), fly back repeat. Ranking out of form isn't totally out of question (if you can find the right wands to make it worthwhile)

the post was dealing with a rager being solo against many enemies, but would be relevant here too.