Collaborative Multiplayer, Humans Vs. AIs

[NOZIGAN]

Dear All,

I am new to this forum and apologize if my questions have already been answered previously.

We would like with a group of friends to start a MP game with 2/3 humans playing collaboratively vs several AI and would appreciate any advice on the best maps for this type of game (we are considering 300+ provinces at least) as well as the most adapted mods.

Also is there a list of previous threads which could walk us around setting the MP game, and answering the usual MP beginners questions?

Finally is there a way to allow an allied nation to enter a friendly province without triggering a batttle?

We really appreciate any suggestion regarding the matter and look forward for any idea from this great community.