It seems you've revised the concept of Kronverk. Instead of a dwarf race, you created a pseudo-Scandinavian city where humans-barbarians became the dominant race. In my opinion, levels 3-4 would be a good alternative in the Stronghold, and Kronverk should have more dwarves.
Besides, they wouldn't fit as an alternative in the Stronghold, because orcs, ogres, etc. live in the Stronghold, but not humans.