I just found a way to one button battle and level up if you have a few free hours and at least the sandcraft, teleport orb, and a cannon that has 6 shots or better. Teleport to boot hill, get in your sandcraft and just hold X. (I recommend going into your options screen and changing Battle Command to "fixed" and Cursor to "memory") A dune king will attack you and if you put your fastest RFX (virginia for me) in your gunners position and fire all shots he/she should die within 1 round. My levels when I started this were around 40, and within an hour I'm closer to 50.