How can we know that Akhenaten faced judgement before Osiris. A damnatio memoriae is a form of judgement on them, but by the living, not Osiris. In all the multiple texts there is nothing that deals with a "rogue king".

The presence of Osiris in the royal funeral text "road maps" can be implicit rather than explicit, and this is the case with the Amduat. In the Book of Gates we are presented with the scene of Osiris in the Hall of Judgement in the fifth hour, though the king is not being judged, he is not even named as being present in the scene. The entire scene has the look of an "attraction" in a funfair ride, where the king will be with Ra on the Night Boat, and Ra says something like, "And if you look to your left you will see the Hall of Judgement". The resurrection takes place in the 6th Hour in the "Benben Enclosure", and Osiris is not mentioned, but it is implicit that he is there, and that the king is there with Ra.

A quote from Salima Ikram

"Later books, such as the Book of Caverns, replace the division of the night into twelve hours by a dicision into six sectors. However, all the books share the idea that the deceased is identified with the sun god, and like him must be safely steered through the perils of the night hours to ensure his safe rebirth, and that of the cosmos, on the following day"

The deceased mentioned here is in fact the king as these books are royal Netherworld books, though some of the concepts and imagery were used by commoners in later times.

And this quote from Erik Hornung.

"According to Egyptian myth the Sungod in his barque knows his way through the darkness of the night to his own rebirth in the morning, having done this since the beginning of time. His capacity for perpetual self-renewal enables us to understand why the Sungod Ra became the guide for his son, the Pharaoh. The deceased Pharaoh now follows the way of his father on the journey through the twelve hours of the dark beyond. If he learns from Ra about all of the dagerous and helpful forces of the night world, he will be able to pass through the night himself and, like the Sungod, rise again in the morning. By being able to follow the way of his immortal father, Ra, the Pharaoh himself can also attain immortality."

The enigmatic texts on Tutankhamun's shrine show the king in an Osirian pose, but with Ra within him inside a solar disc. This is the most explicit example that there is some sort of temporary fusion between Osiris, Ra and the dead king. I did not mean to imply that the king was an integral part of Ra, a gestalt or something similar between all the dead kings and Ra, but that he is bound to Ra for eternity, though, via Ra, joining with Osiris at the point of resurrection in the Duat once every 24 hours.

In the PT, the dead king ascends to be with Ra, not decends to be with Osiris, though Osiris is present, he has to be as he is, in our terms, "The Resurrection".