In most of the games i've played so far (in Sins), my wins have come from outproducing the AI and pounding them down. It hasn't gotten boring for me yet, cause my skill level hasn't yet reached playing against hard AI opponents.
There have been several games that i won however, not from outproducing and pounding my opponents, but by utilising guerilla-style warfare. In these games, the opponent had out-produced me and had a bigger fleet. Hmmm, what to do....
I found out that by sending a few small fleets to attack two or three lesser targets, like Trade facilities or broadcast stations on asteroids, i was able to divide up his larger fleet while my main fleet swept into my main target planet for attack while also giving me time to spread my culture and buff defenses on key planets.
Of course, this method envolves a lot of suicide missions and/or running away when their bigger fleet shows up. But, by keeping a few small fleets busy quickly attacking and running, i was eventually able to wear the AI down untill my fleet size matched and then exceded the AI's. I found these wins to much more gratifying than my bulldozer wins.
Has anyone else played around with guerilla warfare tactics in the game? Or stumbled upon other strategies than just outproducing one's opponent?