cruentus,it takes some time to find out as many of such maps aren't used for team games-usually seen Feldmere and Avatar maps in RT games;
Go to
https://www.warlight.net/Maps and set a sort criteria, mine was number of territories considering 2 or 4 or 6 ... players. Then examine the maps-looking at the distribution modes and look whether they have this A vs B kind of distribution on either side of a border.