For easy victory over the CPU under any difficulty setting, place eight to 
twelve villagers into three control groups. Then, have two control groups working 
on gold and one working on stone until all of the stone piles and gold piles are 
gone. Next, build at least two of every building and upgrade everything as fast 
as possible. If done quick enough you should be able to either swarm your enemy 
or surround him with castles.