Hi, sorry for the late reply. Actually, I think I just need NavMeshes for relatively small areas of my maps. Most of it is open terrain. The only static obstacles there would be rocks, trees, water and steep slopes - basically a 2D plane folded in 3D space.
But then there are areas with walls, buildings etc. For those I will probably need a NavMesh. I have thought about ways to combine NavMesh areas with something simpler, but haven’t really come up with anything. And I also don’t want to spend too much time on something, if I don’t have to. There’s plenty of other things to do.
I guess my setting is very much like Mount & Blade. Not entirely unlike a TW game either, but definitely not as big. I think 200 individual units on a battle field will be the limit.