So after thinking about it for a while, I guess the absolute best way to have the absolute largest number of habitable areas in a system is to find a world with a lot of planets - like a lot, and then build a ring world. Trigger worm in waiting, which, unless they fixed it, spawns those planets back as tomb worlds which you can inhabit. If you colonize each one and build a habitat on it too, you can really expand a lot. When I tried to replicate it in my game, I build the worm in waiting temple on my homeworld, then moved my capital to a ringworld that I had just made. Unfortunately, it turns out the the planets spawn in the temple's location not on your capital. Still, 19 habitable worlds, so not bad.
I know some people think a large number of colonies are dumb, but the population just explodes when you are using colonies, so I'll stick with them
-8 habitats
-Earth+terraformable mars
-Venus, Mercury, Triton, Titan, Io, Europa, Ganymede, Callisto, and finally, Luna all got turned into tomb worlds.
I know some people think a large number of colonies are dumb, but the population just explodes when you are using colonies, so I'll stick with them
-8 habitats
-Earth+terraformable mars
-Venus, Mercury, Triton, Titan, Io, Europa, Ganymede, Callisto, and finally, Luna all got turned into tomb worlds.