Im planning to try something absolutely hideous, France-->Prussia-->(Germany-->)Roman Empire, and also to get a German dynasty on my throne. One question though, if I form Roman Empire with the Prussian Monarchy, do I lose that government form?
I have enough dev to culture shift from Francien to Prussian, near the start of age of absolutism. Should I get the 'I am the state' modifier for France before shifting, or does it not matter because it disappears when the tag changes? Also, are French or Prussian idea better?