It's a challenge but not impossible.
A realm in Rines can become a westgard like realm fighting rogues, or it can become a looting realm, with the entire east coast at their disposal.
It can also expand, seceed and fight it's self.
I Think a realm in Rines can definitely impact the entire islands politics if it finds an effective way to loot other realms.
Westgard is close enough for a handful of realms to have come help on multiple occasions. Astrum, Avernus, Arnor, and Morek, namely. And has a permanent source of rogues to fight. Daimons aren't persistent, and Rines isn't really close to any realm.
I think it'd be better to leave it rogue.