These monster classes should be usable without modifications, and they can be used as actual player classes, or by using ACS or Decorate morph functions. Players can be turned into these creatures offensively or through powerups. It's up to you, really.

You might have to note that every version of these monsters is slightly faster than their AI counterparts, and most likely slightly more powerful. I've tried to keep them as close as possible, but variation was inevitable.