Play a 4 player game on Mines of Ad Valorem. Set the computer to Expert and follow exactly what the computer does and build harvesters in the same place as it. After the computer gets rid of everything but 4 of its own squares It will Start to amass carriers. The computer usually only keeps units on 3/4 of its squares so you can easily cannon one square off and capture the remaining two squares. If your lucky, the previous computer may send a harvester onto one of the squares eliminating the need for the cannon.
Try to have 2 flyers as soon as possible. Plant the harvesters as soon as possible and try to spend less on units.