BigBadWombat

The Bot is available here, it's called PvP Advance: http://www.mimicusa.com/ It fights decently for all classes, is pretty smart, and knows how to use mounts. It actually has better response time than people. It also tries to behave like a person, jumping for no reason, etc. There's also a YouTube Video. The Video is a bit old, but it shows how it works.