A Creative bot that came to mind when playing with my Brood Mother craft (A walker that also had tracks, that was build to defend and soak up damage, while being able to scale hills.)
This is a creative bot that can also dish out some pain. I've been playing with this bot for some time and it fairs well. The big "back" makes for a good distraction when being attacked.
Movement wise, its heavy and takes a bit of learning to scale wall sides correctly.
Huge critical spot in its mid section.
If you build a bot like this, I would only recommend using Rails since this bot is very very slow.