It all depends. You want to progress your fighters, but not too fast. Work your way up, but not necessarily as high as they can right away. It is really style match ups. You need to knw which styles are better for fighting which. For example....GnP kills PG and FS most of the time. 8pts usually beats GnP. But FS usually beats 8pts.

At this point, save your money for more fighters, and some better equipment. More fighters=more fights=more money.