[JJG13]

How about this:

One super shooter (like 254) with two low corner, one pick-up-from-floor-and -dump bots with great drive trains. The shooter robot and one low goal robot with autonomous modes that score 10 into their respective goals and the second low goal bot that effectively disrupts opposing robots in autonomous. Why only ONE shooter? If you have a good enough shooter, you don't want other robots to be taking away its ammunition from the human players. With two great defensive bots, the other alliance should not be able to score much and therefore not have a lot of extra balls to go around.

This is how the ideal match with the ideal robots would work. Autonomous mode easily won (~40 points and 10 point bonus). Defensive mode starts and the two non-shooters stay back and ensure there is little to no scoring. During their first offensive match, the shooter bot collects balls from the human player (shouldn't be much more than ten) and the other two robots protect the shooter robot as it scores its balls. Fourth period... pure defence and, in the last three seconds, all three robots make the ramp.