I need input

Rocks. There are some very large ones that you can stack (with a little overlap, since they're static objects) to make a very realistic-looking cliff face. There are also some very nice enhanced rock textures out there in the modding community, if you're not happy with the stock rocks (rhyme intended!).

There's also a modder's resource on TESnexus for premade cliff faces. I haven't tried it, and I don't remember its name offhand, but I stumbled across it while looking for something else and its existence stuck in my mind. A search on "cliff" should find it.

Thanks, so I can leave the happy "steep" cliffs and generate/adjust settings and take care of stuff as needed right? I'm thinking I could have a lot of fun if that's the case. It'd make generating the regions much faster at this point.