Build a Tiberium Waste Facility and a Missle Silo. Then when your Chemical Missile is ready, wait for your Tiberium Waste Facility to fill up again. When it does, fire your Multi-Missle at your opponent's Construction Yard, which should destroy it. Then, fire your Chemical Missile at the Weapons factory. It may not be destroyed, but you will have another Chemical Missile ready. Also fire that missile at the Weapons Factory, which should finish its destruction. The enemy cannot build any more, or build vehicles. The Chemical Missile should make all surrounding troops Viceroids. The Viceroids will destroy most of the surviving buildings.