The Mouth of Sauron simply is above the Witch-King and other dark servants. Many mistake that this numernorean truly IS the mouth of Sauron in a physical shape of a man. Every word from him is straight from the one Eye.
Yeah, he is. Its the fucking MOUTH of Sauron. He commands the Witch-King what he wants since he simply is the Dark Lord in a man. Get your facts right next time.
Sauron directly controls the wraiths. Its the rings, the rings answer to Sauron, and in turn, the wraiths bide to his will. They're in command of the military, while the mouth is the diplomat and advisor.
Thats not what were talking about right now. When the mouth of Sauron says something the Nazgûl follow the order. He is Higher in rank. He is Sauron in human form.
This is true. The Nazgul get orders from Sauron, who speaks through this man. In fact, speaking the words of Sauron is what caused his teeth to decay and his lips to nleed