The best time for the formation of a new realm was when Erik had all the conquered regions under his power in the duchy of Avamar, before the formation of two new duchies (one in Oligarch and one in Krimml). However, Erik is too faithful to Sirion to consider this option, even when he still have imperial desires.
I still think that the new duchies will become a new realm in a natural way, what will not change anything in Sirion, since we are used with the last borders. I doubt I will see a rebellion in Sirion or the realm falling apart because of internal problems. We have some key characters here to keep the things going on, like Ecthelion and Erik -- even when they have different ways to think how is better to lead our policies.
I don't like to see everyone against Sirion or everyone against Perdan, but the two realms have to face each other, since one have hegemony at the south and one at the north.
