Playing the Inward Perfection civic is pretty chill. I'm actually managing to resist the urge to expand, and my neighbors only aggressed a couple of times before learning to leave me alone.
Well, that's just a narrative of course. They leave me alone now because I float a decent navy, and have an overwhelming tech lead. I've got this one research planet, with a dimensional portal, which I've been pouring a sizeable portion of my total income into. Mostly in the form of exotic gasses for the research complexes, but now I'm relocating pops to it. It's 2310 and I've almost got zero-point power, the requirement for Master Builders, because I'm
definitely playing tall.
I'm not sure if the research speed is super great, but it feels pretty good. I'm only a few points over the administration limit, and my economy is doing so well that I can
Take the Unity option for trade
Let my people farm because they want to (Agrarian Idyll, grants amenities) then sell 100/month off
Buy about 10 strategic resources/month from the market
Have social welfare dropped because everyone was deliriously happy anyway, no one is unemployed, and I was falling behind in consumer goods AGAIN for some reason.
And have nutritional plentitude, health care edict, and individually running the "Encourage Planetary Growth" food-decision on each planet. Which is quite tedious, there's no notification when it times out... But it's worth it, because pops grow so slowly, and in this run I don't have immigration.
This all took some juggling and trading before I genetically modified the race to be Extremely Adaptable, now I'm running a nice surplus across the board. Habitability penalties were certainly a factor in my consumer-good woes.
Edit: In like 2020 my nearest neighbor actually vassalized me, which was... so amusing that I just accepted it? It was a little frustrating not being able to expand into the areas I'd cut off for myself, but I also didn't have to worry about war for a few decades. Apparently the "tribute" is merely fleet power, which I didn't care about. When I was done building up what I could, I had an easy war of liberation.
Later they (on my northern border) attacked me because I didn't bother to build my navy up at all. I had built up our 2-system border with signal-jamming starbases which ensured they lost a lot of ships. I counterclaimed and won a few systems so that we'd only have a 1-system border, and they haven't bothered me since.