You got my vote for RA2 Wizard. Always and forever.
The laziest way to build one is by giving the largest chassis possible Steel 10, then put MEs all around and do Hammer4 chains everywhere. If that's not enough, fill the rest of the chassis space with 60kg ballasts. :P
Sorry, forgot to mention. Has to be done in the bot lab, realism rule applies (but is pretty loose, just no overlapping motors and batteries)
may the best computer win... or survive Sage can pay out the winner's robots weight in $USD, so the higher the better :P
pause button? xD But that's why its a challenge!