I just brute force my way through everything!
Eco/Military/Efficient Defenses > AI Progress/Extensive Scouting
How can you form the most efficient economy without knowing where the best resources are?
No force can be considered truly brute unless it is directed against the weakest point.
Knowing where strike will come from makes defenses efficient.
Truly, there is time enough in this game to do both. The investment is small, the return, even if small, is worth it.
Finally, on larger maps, simply expanding until you find the AI is time consuming, dangerous, and expensive.