- Evil Healers? (not a new idea, but there would be a need for them) Alhemists, Shamans, Dark Priests?
- Blacksmiths? would gain exp by making gear for other players. making gear out of what? well when the goldmine or something similar is finished maybe they could get the materials there?
- Chefs, would gain exp by making meals which would buff attributes for a period of time? Spinach soup would increase str xD