Permalinks: Subcategory only?

I’m curious if anyone knows how to get a category slug in the permalink consisting of just the subcategory.

Using the WP No Category Base plugin, I’ve gotten as far as:

https://dev.mysite.com/category/subcategory/post-name/

All subcategories are nested into parent categories for the sake of adding them into the navigation bar. But we want to remove category/ from the URL. The only way I see that works is to un-nest the subcategories and remove the category altogether.

Thanks!