I would look at this site and see what combos you like. http://www.worldofballpythons.com/morphs/

many ways you can go, one would be to get a bel (mojave x lesser) female. breed it to your mojave. you could get bels that are mojave x lesser, super mojaves, mojaves and lessers. no normals. you could pick up something fire or with enchi in it, if you're not going to get into a big breeding project, look at the site above and go with what catches your eye. good luck and let us know what you would like to go with.