Frost Elves:
I see Bex as center for us in SE. But no outlying settlements or trade colonies.
I would be fine with that ;)
I've got ideas for Bex with it's development, and interaction with other nations.
Creating a trade network between cities with roads, but also trading posts.
Hiring out military units I'm not using, to save on creation costs and draining population, especially if I end up being able to make something others don't. That Healer could be awfully usefully to hire, for example...
Acting as a bank and loaning money out, but needing to make sure people don't default on their payments. Think the Iron Bank, from Game of Thrones/ASoIaF.
Establishing diplomatic missions everywhere I can, as they also count as trading posts too!