Thank you, Steve. I might have written my query poorly. The front lever progressions are coming along splendidly and have, in fact, become a favorite.
But I've somehow gotten it into my mind that exercises should come in pairs: a push deserves a corresponding pull. I originally tried to use the planche progressions as the "push" component. My body, however, does not like them.
The question I probably should have asked in my original post was this: what exercises do bodyweight people do to work the posterior chain?