[Aren_Hill]

Well defensive robot is obviously one that's great at disrupting opposing shooters to miss as many as possible.

Human loaded robot is necessary to redeem all the points the other team scores, as each ball is a 3 point difference you need to make up.

Ramp camping is more of a location based attribute that brings variety to the shooting arsenal, making your alliance harder to defend.
1 defensive robot will have a hard time covering someone on the ramp shooting and a perimeter robot.

Floor loading is important to score points essentially for "free" as you have paid no toll for them, these give you a +3 point advantage over the other guys.

Perimeter shooting as stated above just makes your alliance harder to defend.