Would you people recommend it? If you controlled a Empire-tier title would you make and vasslize a High Kingdom or would you divide the High Kingdom into various Dukes and Kings?
I suggest dividing high kingdoms into 3-4 megaduchies
Because the alternative is having thirty-six ducal vassals under you as the High King of Cyrodiil alone. You need to remember that most of the High Kingdoms are the size of empires in vanilla CKII, with Cyrodiil being larger than the empire of France and the Kingdom of Germany combined, perhaps as big as France and the HRE. With so few king tier titles in Tamriel, great dukes are necessary if you want to stay under your vassal limit, especially before you're able to found an empire to begin with. I once decided to max out the Diplomacy stat of my character and his chancellor to test it out, and having each duchy held by a different character in Cyrodiil, Skyrim, and most of High Rock still put this character over the vassal limit before I could form the Cyrodiilic Empire.
It should be noted that in most provinces, particularily Cyrodiil and Skyrim, the canonical holdings of the lords under the ruler (Counts under the Emperor in Cyrodiil, Jarls under the High King of Skyrim) actually occupy multiple duchies in this mod. I got the number of duchies in Cyrodiil from the game files on the landed titles, and noticed that separating the duchies into "blocks" are the "kingdom" titles commented out. For the most part, these title blocks correspond to the land held by the Counts in Oblivion, with exceptions to Chorrol and Bruma being in the same block, making the k_colovia block the largest of them all in regards to the number of duchies held. If you're willing to try to give everyone duchies in an effort to make it as close to cannon as possible, you can divide Cyrodiil between eight duke-tier rulers, with the largest probably being the one controlling the "Heartlands" block; the block with the capital of Cyrodiil.I'd rather not divide up 36 into 3 or 4. That makes your Dukes FAR too powerful. Just give them 2 duchies each and you're down to 18 duchy vassals. I can't imagine giving my vassals that much internal power in my realm.
Not having high kings as vassals just seems wrong in Tamriel.
I agree, it's easier to deal with just a few vassals, but if they get annoyed with you and 2 or 3 revolt at the same time you've got a major civil war on your hands
Sometimes not as much fun as they can be