The next problem to consider is what creates a 'top level' unit. "Independence?" What does that even mean? Many historical leaders were concerned with stability and extent of power more than "independence" in a modern-state sense.
The approach here is totally confused. 1366 Touraine here is a "civilisation" despite being a (misplaced) county: Isaac Komnenos' independent Cyprus in 1188 is Byzantine which would have been news to the Byzantines who had recently lost a fleet trying to recapture it.

