Making Mesos as a Priest

Level 99 Priest;

What is the best mob with a spawn that doesn't suck nuts (meaning no bosses) I could easily solo for mesos?

Merchanting is not a mob btw.

If you have a FM shop, you could set it up and sell snow pieces for 5k (Khaini) or so each. Solo at Mushie MD would be around 5m an hour.
That or hunt Gach boxes.