Get some Advanced Carryalls and you can steal the enemy's Harvesters. Make sure you do not go too close to your own forces. If you do, then your own Carryall may be damaged or destroyed as your own units try to kill the Harvester. In this way you can keep them out of the game without alerting the enemy that a unit has been lost (if playing human player). The CPU may or may not make a new one, and in this way you can slow them down. This trick also works for stealing any other unit, however it is dangerous because it wont pick the unit up immediately. It takes a few seconds to become airborne, and while on the ground any weak unit can take a pot shot at you.t: Atredes: Stopping sieges with Minitowers:
The Atredes Minitower unit (huge four-turreted mech) is extremely powerful. Use the following trick to stop the AI's siege with those Minitowers. Get several cheap AA units and an Advanced Carryall unit to pick up the Minitowers, which the AI never escorts. Place them carefully near the AA troops. That will keep the troops from hitting your Advanced Carryall. The Minitower will not be able to fire. This works best for the Ordos. If your Carryall is hit, then it will repair itself.