I'm wondering the same as the others, ohp should be a staple in your program. Not expendable imo. You were recommended it by a successful bodybuilder? Don't take this the wrong way brother, but perhaps at his level he feels it's not necessary for him. If he has massive delts and a big bench to boot, he may program his shoulder work for looks rather than mass. Also, I'm not sure why you are substituting variations of the big three. Can you provide some sort of logic to this methodology other than it just being recommended?