Honestly I don’t have access to CC right now, but say the stand to stand bridges. The wall walks I find more work the shoulders than train your body to properly do the stand to stand bridge. The only thing I really did for it was the one arm/opposite leg bridge. The stand to stand bridge is all about the posterior chain and lower body development and activation in the bridge, the shoulder strength required is minimal. For the one arm pull up, I find the best progressions are negatives and isometrics (one arm flex hangs), neither of which are mentioned in CC. It’s mostly a general approach to the methodology of the progressions. Like, he used a basketball for lots of progressions, but I’ve never done that, and I recall finding every variation in the book with the basketball seemed less practical than a given alternative.