I've played a few games now (mostly on Normal), and I notice that the AIs have been moving up the Energy Weapons Techs without regard to either Mass Drivers nor Missiles. At first, I thought maybe it was because they were trading with each other to help one another up the energy weapons techs, but when I turned Tech Trading off they still did the same thing, all four major races had researched ONLY energy weapons independently.
Why is that? Am I just not playing against intelligent enough AIs that they all take up one weapon type to make it easier on me? If I made their intelligences higher would they diversify their tech interests?
I'd prefer more diversity. So how can I achieve that?