MPVictoriaUniversalis is mod based off of Victoria Universalis another mod on moddb, this mod compared to the other mod adds features from HFM, HPM, and other mods to make a cooler experience overall. I do use this for a multiplayer server which was originally was just a branch off Vicky Universalis, but now is much bigger. I did add some original stuff, like "questionable" formable nations, decisions, and balancing. If you want to leave any suggestions, or just want to tell me what you might want to add, then join the discord server, or make a comment on the latest file.
The MPVictoriaUniversalis 2.5 Mother Anarchy Loves Her Sons update fixes a good number of bugs, and most importantly adds anarchist black guards and a government type, both of which act as end game bosses if they become too powerful.