Shame we don't have a fully function HRE. Would have been interesting.

AVSM tried to do it, but it was pretty much Austria = "its mine mine and mine".

Using White Squares, there are these factions -
Kazan (East Russia)
Algiers (Africa)
Crimea (Dangly bit)
Ragusa/Montenergo (1 hex, hurrah!)
Genoa (or at least Corisa)


Anything else involves siezing territory and looking towards the big factions...
Bavaria (South Germany East side)
Tuscany/Papal States (Italy)
Bohemia (again)
Prussia (north region of Poland)
Savoy (again)