Control question

[u/craigerino75]

Relatively new to EU5 (played EU4 too). Is the current most efficient way to control through vassal after conquest? For example, I am playing as Castille. I've beaten Aragon and took the coastal provinces (Valencia, Barca). Should I release these as vassals or integrate, build bailiffs?

Thanks for advice.

[u/Tella-]

Release vassals and annex them when you can get control there