you need to think out of the box.
First everybody is worry about the 3rd robot scoring. what would happen if a defence robot can push 2 robots at the same time around

leaving the other robot 1 on 1.
If you where to block a side goal while waiting there you could be filling it with balls
no one have said anything about the ramp. this is going to be big. it is worth 25pts if you get three robots up there. I like that because if you push your opponent up on to the ramp you can hold them there until the end.

(by the way the ramp I think will flip robots over if being push to it) that will make it easy to move a turtle on its back up the ramp.
go to where the points are and you will win.