OK folks, a few choices here. I'm a one man team here at the moment, so therefore very interested in what our loyal, discerning fans want to see.
If it helps, here's a rough idea of completeness:
Goryeo - 10% done
Xi Xia - 60% done
Khmers - 40% done
Champa - 40% done
Khitans - 15% done