It’s to show how FSLS can be applied to 5/3/1, 3/5/1, or 5 Pros.
Just pick one and do it. You don’t need to worry about leaders or anchors or 7th week stuff. Just run 5 Pros FSLS 5x5, Deload after 2 cycles and in 6 moths re-evaluate. Don’t worry about it too much