Some nice thoughts there Ginger, and we may try that the next time we're back this way. Currently, I want to try the other scenarios and battles from the Battles Book first. Next week should be "Refight 3: The Hellblade Mountains". We're trying to give a more detailed set up and 'Air Recon photo' in the AAR so that others who want to try this can do so easily. I'd love to hear how they went.
The scenario itself is tricky. Larger forces favour the attacker, smaller points values will leave more 'holes' for the spy to escape through. Tyranids may not be an ideal army for this scenario, being largely CC. A more mixed army so that you didn't know if you were attacker or defender/spy beforehand would have been better but I couldn't see the Tyranids as a spy

. As is, the Tyranid player, if he'd remembered his Lictors, could have blocked the gap. Monday morning Quarterback

All in all, it was a fun game and we had a great time.