I think that a good idea, since most others are dead, would be a balkan total war.

Involving the factions:

The Bosnian Kingdom

Venice

Croatia

Zeta

Raska

Dubrovnik (Ragusa)

The Byzantine Empire

Hungary

Bulgaria

Starting age in 1200

I hope I can get a team of Balkan peoples, and Bosnians together if they would like to try this idea.