I'm starting a new campaign using the Stjordvik's doom adventure I ran a couple years ago.

This time, I'm using full BR rules. The players are jarls and will play the kingdom using the rule by council rules (1 action per month).

Now, I was thinking about splitting the domain. Rjurik realms are different from Anuireans : each jarl has his own law holdings, sometimes even guild or temple or source. RAW, I think, everyone collects their tiny RP and GB and put them together, but I want them to act more as a single kingdom.

I'm using 2E rules (get the lowest between domain power and blood score). Consider this scenario: A thief Jarl gets 100% domain power from guild holdings. If the king is not a thief, he gets 50% from guilds. Since domain power sum will not be exactly the same , I'm thinking about the following solutions:

1. Unify everything, and always consider the best % when adding to domain power;
2. Only province levels go to the king (taxes+domain power), Each jarl has a personal pocket of their own holdings, but may freely contribute to the crown expenses.
3. Unify everything, but only the Crown matters. If they are losing regency from this, maybe they should start thinking about "replacing" the king with someone more "fit".

I understand that RAW everyone should collect separately and decide via vassalage how much to give to the crown, but in this adventure jarldoms are more into background, and are not played a single, 1 province domains, so I was wondering what would be more fun in this sense and why?