To power down and entire base just get a disc over any power source controlled by that opponent. To make money get one of the disks over your opponents refinery."If the Disk is generalised, you get the cash quicker" If you cant get to a power source to shut things down you still can shut down them singualy, get a disk to attack a prism tower or the likes, and it will stop working, allowing your units to move in for the kill.