Here is my difficulty in understanding. The LRC schedules call for speeds which are always in excess of green dot speed, so are always faster than the speed for best L/D.
I think I can help you overcome your difficulty in understanding. Go to your FCOM and look up the definition of "green dot speed", then determine if green dot is relevant to your calculations, or a red herring. I would do it but my aircraft no longer has a green dot so I don't have the books.