Quote Originally Posted by Bob the Spork
Incorrect. The great spell that Nagash cast killed everyone in the region. That's all the city states, and everyone in them. There is nothing living in the area, at all. Whatsoever. Zilch. There aren't even any plants. The only things from the area that are even remotely alive are the very oldest vampires, like Abhorash and Neferata, and they don't live there any more.

Also, so you know, Khemri is a city within Nehekhara, as your post suggested it was elsewhere. Being the city once ruled by Nagash himself, it's pretty much the deadest of the lot.

If possible, a complete lack of people, but plenty of resources (so good to have), would be a good idea. Maybe the pyramids could cause a massive negative population growth or something, to keep it at zero? Then you just need a way to recruit still.
But about conquered lands? And what if it got better? Like nuclear fall out.