[MooreteP]

I would go with Robot to Robot defense.

The game hasn't had the time needed to develop a "zone" defense. Nor do we have enough "players" to implement an effective zone defense.

I believe that a single defensive Robot could interrupt the assist cycle enough to make a difference.
It will be interesting to watch if an alliance tries to bother a defensive Robot on the opposing alliance with one of their Robots who has already performed their assist duty.

I am liking this game more and more as a great analogue to sports where coopertition on a team (alliance) to score points is the Holy Grail for success on the play field.