Time to throw out a bone. The price: Post some MV scores with your newfound superiority.
Galaxy: All-abundant, Immense, Tech Brokering on. 9 AIs, 8 minor races.
You: Terran Super Diplomat Technologist. 8 ability points go to speed. This gives you +30 to start.
You are NOT going to colonize until later in the game! You are going to research to Intestellar Republic and trade it to each AI for one planet and their space miner. Trade for Interstellar construction and as many other techs as you can. Research Sensors, upgrade all space miners to survey ships with Impulse Drive and several life support modules. Design the survey ship using a cargo hull.
You will have 11 survey ships and +40 speed! You will dominate the Anomaly Arena!
Next, get Master Trade. Rush-buy (always use the longest term lease) the Galactic Bazaar and Diplomatic Translators. Get an Economic Treaty from all 9 AIs and all minor races. You will have to trade lots of techs, but it will be worth it!
To avoid going broke during this process, trade the AIs influence points for cash every 4 weeks. Start as soon as you have the Universal Translator. You can also trade premium techs, such as Habitat Improvement, for several planets from each AI.
After the econ treaties get you into a profitable state, research Advanced Miniaturization. This will allow you to upgrade scout ships (traded to you by the AIs) to tiny colony ships with a life support module. It helps to have the Eyes of the Universe, which greatly expands your sensor range. Use these to snatch up any planets in their range.
This strategy, once mastered, gives you the basics to ruthlessly decimate the AIs.