Subterranean assault Build a very large army of cyborgs.
From there on, it's pretty obvious. This is a very lowly tactic, generally considered as bad as treason unless you're desperate. Put a Cyborg Commando in a Subterranean APC and fill the other 4 slots with engineers. Then build an Obelisk of Light and have it ready to be placed. Send the APC in the enemy base and use the Commando to blow up as many things as you can.