So... I found a "tactic" (it's a cheat but doesn't spoil your submission) To jockey for position at the beginning of the game.
Start a new game with whatever settings you want. As soon as the game starts up... save it. I used "Game Start Clean" as a title. Then go in and enable cheats and remove the fog of war. (you can figure out that bit for yourself) Check out your position on the galactic map. Don;t peek at any of the stars... just look how close your neighbors are. If both of your game's "evil" major races are right on your doorstep and blocking you from being able to expand beyond the handful of stars in your particular cluster... make a new game. If you're good with how crowded your neighborhood is... simply reload your "Game Start Clean" file and play away. You're going to find out who your neighbors are and what there true holdings are in the first few days of play... it just helps to not play for a few days and find out that your game is now stagnant because you can;t build out through a particular empire before they can run through and scoop up all the prime real estate. I did notice that the game loves to back you into a corner as over 90% of the games I started put me up against the wall in a small cluster with the two evil races (regardless of what races I made evil) in bigger neighboring clusters. I figured it out that I would need 6 starbases to go around them in many cases, or seriously beef up 3 or 4 of them in enemy territory to go through them. In both cases they could easily split my empire and cut off one group or the toher just by nailing a few starbases.
So... take a sneak peek and make sure you have room to breathe before jumping into a 3 year campaign that becomes a 3 day waste of time because the game doesn't distribute the races intelligently (or very randomly for that matter)
I once set up a gig/tight map with 5 pure evils and was placed in a 2 star cluster with no habitable planets other than Earth... 15 parsecs away from the next star...