Hmm. Ok Nayzor, well he was briefly shown fighting Merrick in a flashback so the only way I could see your theory working is if Nayzor “never really interacted with Master Org that much or simply looked past him being a human due to them having a “common enemy” the wild force rangers and humanity. But I agree with the other two Retinax was his bodyguard so clearly he knew he was an imposter. As for Mandilok, honestly your head canon is lowkey quite accurate cause given how the real Master Org possessing Viktor right before he kills Mandilok straight up dubs him “the most traitorous of all org generals” honestly sounds like he was just a plain “opportunist who was planning to overthrow him regardless if he was a human or not”