How about two humans playing each other? Each can have 3 AI allies.
Druids and Witches together? Both summon creatures. Druid is more foresty and witches more swampy but both create very interesting armies.
Warlocks and Enchanters on the other team? Warlocks create elementals. Enchanters are mostly a large variety of golems.
I dont think I would Cluster Start this game. The 4 nations on each team overlap resource needs too much. Better to scatter out so that everyone can start off by claiming the resources near them to get a firm start.
