I like big maps, so I play the biggest map with all computer players.
At first I would play on normal setting. I would do pretty good, but after about 4 planets 4 or 5 massive armadas from different computer players would show up all at the same time at different planets and my massed fleet could not defeat them.
So I switched to easy--thought I was kicking butt. But after about 8 planets the same thing happened---its like all the computer players are working together against me.
Any tips for general ways to beat the computer? I tried defending each one of my planets with tons of missle points or hangers (maxed out tactical slots), but eventually these just get totally overwhelmed by massive fleets on different planets all at once. My fleet, although large, just can't help everywhere at once.
Any tips would be greatley appreciated.
And BTW, this game RULES. Even getting my butt kicked its fun as hell 
Thanks fellas.