[MrJohnston]

I could see defense being valid for several situations... Consider: If you have three high-scoring shooters on your team, it is very likely that they will not have enough boulders to keep themselves busy - at least not without trying to grab one from the opponent's secret passage.

So:
* The third bot might as well consider playing defense (unless it can damage more defenses). The first two can likely handle all teh scoring.

* A bot for the team without the shooters might consider tripping up the shooters - or at least make it difficult for them to grab boulders from the secret passage without incurring a tech.