So the AI will snipe an undefended city if transport isn't involved, and it will transport SoDs, but it won't use transports to snipe. How much of a hassle would it be to add some flexibility? I can think of a few approaches, but "doable" is not the same as "going to get done". Over land, doesn't the AI size the attacking force based on the defending force? Or are SoD always constructed without reference to a target, and then set loose?