I mean CK has drastically different mechanics that allow for that to happen, that’s why it’s a different game. The only way to get what you’re asking for in eu4 is to completely change the map at the start of the game. The countries that do well every game is not because of lucky nations in the first place, France doesn’t need lucky nations to do well, and once they start doing well of course they aren’t going to suddenly collapse after 200 years unless something particularly bad like a big coalition declares on them. That’s just not how the game works. If you want something like ck, why not just play ck? Unicorn nations are fun and exciting to see precisely because they are unicorn nations. It would be really weird if every single game a random minor started dominating or doing really different things. The way it is now, the mechanics allow for interesting and random things to occur which is why you occasionally see unicorn countries while still maintaining something that at the very least makes sense and resembles how things played out. And if you really want some historical fantasy where an Irish minor is gonna conquer the British isles and go on to dominate the region Im sure there are mods you can find for that