You and your "ally" have found yourselves across a small, unstable cliff ledge over a seemingly bottomless pit. Lurking across the path is your enemies. You and your partner must share a small area, managing space and resources in order to be successful against an enemy quite literally staring you in the face.
-2v2 style map, makes an excellent 1v1 map, alternatively.
-Cramped locations forces allies to manage their forces, their base size, and their resources. If allies do not cooperate, they will easily fall victim to enemies who do know how to cooperate.