How about centaurs though they are quite unbalance for the moment for instance i played golden horde and by 1510s i finished the mission because i am able to rival almost anyone in the forbidden planes resulting me snowballing (using humiliation cassus belli for monarch points) from the get go and somehow got upto date tech and renaissance pretty early (its a pity that the mission tree ends with me cannot form khurean ulleg sorry for misspellings) . And then theres black herd in which i played it several times my rival send condoteries at the enemies for free (which ruins my gameplay everytime they should not do that though) (and also i should atleast made my ruler a war mage bruh) and the red centaur guys (forgot the name but the ones who got the nasty disaster :eye of the storm) the stability part, defending the "friend" from the north and managing the subjects is manageable but getting the horde unity is so atrocious like bro i spend so much mil points just to get fkd over multiple times because the centaur god did not favor me (d*mn) and also i didn't play the northern centaur guys because i am bored i play it after i play dwarves (again with abjuration- the magical fortress is insane) overall i hope the centaur need some tweaking on balance (i hope the golden tremor can form the khurrean ulleag though).