Here is a map for 8.
It is in the shape of a big U separated by water. 4 teams start on one side, 4 on the other.
The base of the U is a tortuous route to get to the other side (AI doesn't seem to be able to navigate it).
However, there is an easily defensible (by land) treasure trove of resources in the base of the U.https://imgur.com/gallery/WRvIUDw