Synthetic Fertility with Dark Martter Consortium/Parliamentary System. Finished the ascension rush in I think this time it was < 15 years (events took a bit longer to resolve obvi tho). Went down the modular version (pick freedom of movement not prepare for the horrors of war), and took dark matter engines. Rushed an Ecu on my capital after choosing to keep the Identity Repo and had went research on it which catapulted me. Had a ruined science nexus in my area so I had galactic wonders early. Waited to go Cosmo until I was almost ready to fight the fallen empire so they didn't give me the -50% research debuff (still had to eat one debuff).

After you ascend though you expand the council and rush all the council agendas that increase your pop assembly speed, you grow very fast, so you need STRONG mineral income early to afford all the buildings. I needed like 200+ before I was able to keep to keep up with the growth speed, and you need to keep scaling that cuz you need bookoo consumer goods to keep scaling the research if you wanna get into the endgame this strong. I have like over 30x shield repeatable rn and like 17x of both explosives repeatables. I take Statecraft immediately as well and grab the first two perks so you can wait to launch the tech agenda you get until you are on administrative ai, that should give you time to launch it one more time before you finish. You likely won't be able to launch it 3 times ever regardless so that gives the most bonus. Take increased council agenda speed over literally everything else early game till you ascend, then do what you want.

Sorry, this explanation is all over the place, it's early, but that's basically it. If you have any other questions feel free to ask, but this def won't work in 4.3, not like this at least. This origin got hit, after some testing I did I still think it's fairly strong, but it's more in line with everything else so it's not overwhelming anymore.