This strategy works well against the Allies. Build about five Demolition trucks and five Telsa tanks. Send the Demolition tanks to an enemy base and spread them out so that they do not destroy each other. Place the Telsa tanks back, away from the demolition trucks. When the CPU starts sending units to attack, they should run into the demolition trucks and start shooting them. Sit back and watch them blow up and get fried at the same time.