>>528439296
15 provinces per player
Wraparound north south east west
Small caves
A single level two throne per player, get half to win. So 10 players = 10 level two thrones get 10 points to win for example.
Sloops comfy balance mod is fairly popular, but that's your choice.

If you wanna be extra effort you can download mapnuke and generate your own map. Though that will require setting a hard limit on how many players can join, I recommend between 9-15 players. 12 being a sweetspot I think.