It depends on the outcome you're after. If you want a very gelatinous broth that is rich in collagen, and great for gut health - the frame, wings, and feet are essential inclusions. I find it quite difficult to find chicken feet in my area so I use a frame and 6-8 wings. This seems to be a good compromise, as I still get quite a jelly-like broth from it. If you just want a lovely light chicken broth, a frame or two will do. In fact this is the kind of broth this soup produces.