It was hard to follow the reasoning behind movement selection and rep schemes. There are so many different variations that it seems the entire lift is weak so you’re better off doing the competition lift for the bulk of the volume. In the Sheiko programs I’m most familiar with, there aren’t that many different variations because you’re supposed to make noticeable progress and adapt to the chosen variations.
When modifying Sheiko programs, you should be aware of how the intensity and volume progresses throughout the cycle. Making a plot showing highest intensity, average intensity and volume on a weekly basis for an entire cycle will give you an idea of how it is set up.