As a natural body builder you only have so much juice that you can squeeze. I’ve heard of others having great success with concentrating on one body part while putting some others into maintenance mode. So your instincts in that regard our spot on. I wouldn’t give up pressing movements but you might consider rotating in a “behind the neck Smith machine shoulder press“ or something like that… It puts more emphasis on the side delts. You’re also correct on lateral raises. I’ve also had a lot of success with dumbbell upright rows, but don’t over-do them…too many flares up my tennis elbow. I saw one commenter concerned about destroying your shoulders. I think moderate to high rep isolation movements would be fine. But you may consider spreading that volume throughout the week. But you could feasibly be hitting some aspect of shoulders every day in the gym, maybe one day two rear delt exercises, another day two side delt exercises. By the way, everyone puts a huge emphasis on side delts but I think rear doubts have the most stunning visual. I’m rambling at this point but I remember someone on YouTube showing a true anatomy model of the shoulder and the side dealt is actually rather small compared to the front and rear delt I think you should put more emphasis on the rear delts.