There's no predetermined classes or predetermined build or classes, just skills, with the end goal of reaching the maximum of 99. But RuneScape 2007 Gold, as that's not practical nor perhaps desirable for the majority of us I'd suggest that you specialize in just a few. Meanwhile, the overall character or combat level has an maximum that is 130 (or 12 in RuneScape Classic). I think I got to 85...