Okabu

This challenge is extremely frustrating and the hardest in my opinion. But with a bit of strategy it's not so bad.

Basically, I moved the 3 guys down to the bottom-middle of the map for the first few waves. Once the "Everywhere" waves started I would gather all 3 up and run around in a circle until the Dozabots clumped together. I would then set them at a safe distance and slowly pick the bots off 1-by-1. If they got too close I would move away again and repeat as needed.