Most of these things are guidelines to give you an idea as to where they roughly should go, but ultimately you’ll discover overtime where you like things, because ultimately it’s your rifle. You’re the one who has to shoot it.
I’d recommend watching all of Shrek’s videos. Not just for the information that he’s giving in said video, but look at his setups. He has different rifles and some are setup differently depending on what its purpose is, and what round he’s using.