I have the start of a book that covers why the Kaldar settled outside the cities but I'd like you to take a gander so I know it doesn't conflict with plot or plan.
I also shot an email your way but those are notorious for being left to die in cold dark places when unasked.

Jerevth
"For no one in this world can you trust, not men, not women, not beasts. (points to his sword) This you can trust."
Conan's Father