Like I said before, building up to being able to do big name necromancy is part of the fun. We can't raise the Khan immediately of course, but that's a long term goal as we work on improving our ability to do so, helped by the fact that our MC is really good at killing things herself which makes her a lot more flavorful than your bog standard necromancer and has synerg with the Lady of the Dead who will want things killed.
Paved with Bones gives us a unconventional plot hook and goal for our MC to chase that will affect the wider world. Meanwhile, Chosen of Hora doesn't really seem to want to do much besides being a traditional barbarian warloed, which while good, is pretty vanilla as far as characters go.