Do Psilons first, Creative is the best race bonus there is
I always create a custom race. I think it goes something like:
-Negative Spying
-Negative Ground attack
-Low Gravity Planet
-Subterranean Homeworld
-Creative
And some others. I save enough trait points so that when I get the Evolution upgrade, I can use the few more points to get Industry +2
Get transport ships, colony ships, and freighters first. Then build up your industry. Research Construction get Auto Factory and a few more things like Holo Emitters that boost morale or industry. Research up to some basic weapons and armor like Fusion Beams or Graviton Beams, and Class 3 Shields and Radiation Shields
Then I put a ton of research into whatever the name of that field that has the Biospheres. Get that up to Terraforming so you can get some decent planets.
Next I start researching that first field, the one that has the Battle Pods. That has a lot of good stuff like Recyclotron, Robotics Factory, etc. You want your industry maxed as much as you can. Pay off or bribe anybody who tries to attack you early.
Once you get some decent tech, I’m thinking up to some range 5-7 parsec engines, the first 2 types of missiles, Graviton Beams, the shields after Class 3 Shields, Pleasure Domes, and a little past Terraforming, you can start attacking people. PIck off the weak ones first, build up some Battlestations to protect your planets, and expand in quick bursts of overwhelming firepower. Once you can beat the Orion Guardian, you’ll pretty much be the highest tech person. I usually research everything I can before I take Orion, so I get the rare Antaran techs.
For leaders, get ones that have labor and morale. Get research too if you can in the early parts of the game, but ultimately you want to keep the labor and morale boosts.
That’s how I play. By the way, this strategy only works for the specific races like Psilons or a custom race with Creative. I basically don’t play any other way, I cannot stand having to choose between upgrades, I want them all. So I never play without creative, like ever.