If you have never run a high protein diet (1.5-2g/lb body weight) and are advising others against it I suggest you either stop speaking on things of which you have no knowledge or try it yourself first. There are plenty of ways to skin the cat, but don’t go discounting ones you haven’t tried.
You will not find a study that simulates a well-trained, anabolic enhanced athlete on...pretty much anything. You simply won’t. Studies are typically all married and guideline you HAVE to supplement with experience and experimentation on yourself, especially when adding anabolics.
So long as your bloodwork stays good, 1.5-2g/lb (yes...2g, so 400 for a 200lb trainee) will have the vast majority of you leaner, growing faster, and more satiated during dieting phases as well.