I think I've found my perfect no stress game.
I started as the Kingdom of Sri Lanka in 867. They're already feudal, already have a mine and university, and have a total of 8 castle holdings. I can't hold them all sadly as I used the default starting ruler who wasn't particularly great but I've been playing for about 30 years now and he's probably got at most a decade left if he's really lucky and the future lineage will easily be able to hold all 8, I just need to revoke a few titles from family members when it comes to that.
So far in the 30 years I've increased my development and built almost all of the buildings I can with my current innovations, so I'm just making hella gold (mostly due to the mine). I was able to add feudal elective to all 3 counties so my inheritance is basically primogeniture, I could pick a different kid but I kinda like having to play as the oldest. The main continent of India only has strong players in the northern half, the southern part is still very divided and always at war with each other so even with me barely bothering to upgrade my army, they don't even think about touching me. I have like 15 kids and counting bc my religion encourages me to have 4 wives. Also about 25 grandkids and some great grandkids so far. Dynasty is going real strong.
My royal court fluctuates between 9 and 10 as I don't quite have enough to keep it above 10 permanently, likewise I fluctuate between #1 or #2 in the world with the Byzantines. The only thing I'm trying to rush before this first guy is getting one more level of deviation so I can consecrate my blood. If not oh well, I can get it as one of the heirs but I'm pretty close now. I think one more pilgrimage will do it, I just returned from my first one since I was more focused on upgrading my buildings most of the life.
Not sure what my long term goal is, once I completely run out of things to do in my kingdom, maybe I invade the main continent and try to form the empire but so far I'm very happy playing politics here. Very fun start