I'm having issues with SemiRand working with the Alexander map so I'll go with the original choice of Cradle of Dominion. Due to the size constraints I'll limit the AI's to a single team of four, three land nations and one water nation.
I am thinking the AI's should be on "Difficult" setting.
The mod can be found
here, of the three versions we will use the Gold + Resources version.
Cradle of Dominion you should already have.
To answer your previous question, this is an AI vs humans game, there is to be no fighting between human nations. Deals about swapping provinces or allowing another nation to take provinces for movement purposes are fine.