The problem of fort types

[Sombre]

Given that Machakan units all have forest survival and they have the God Forest and God Mountain magic sites, I'm not sure they're really a grassland nation.

But I agree with what you're saying, largely. Though I think the forts for swamp and wasteland provinces would have to kick ***, even more so than other specialised forts, simply because those provinces suck so bad. No amount of admin or defense can make up for having about 1.5k population, so it would have to be really cheap in terms of build time and cost /as well/ as being a big fort.