The Aeon Enhancing Magus
If you are willing to take serious my idea that the Primary Utterance of Xeper is best understood as the Utterance of the Verb-Root itself you very quickly run into a challenge. Because of its purity, and because of its infinite ways of conjugation, the Primary Utterance can be tremendously overwhelming. It stands as a unique fire within the Amethyst Realm, drawing all that was before into its light and shining forth in all directions. This is what one would expect of an Aeon Initiating Word.
Humans aren't good with infinities. Having unlimited options leads to paralysis from overwhelm, or a reversion to previous more limited ways simply because they are known. On an Aeonic scale one of the functions of an Aeon Enhancing Magus is to provide a specific conjugation of the Primary Word of that Aeon which passes its Infinite Light through a specific lens. The Aeon Enhancing Magus' Work is more focused than that of an Aeon Initiating Magus, but in most cases it is less expansive.
The Temple of Set's model for what it terms an Aeon Enhancing Magi comes from Bennett, Crowley, and Jones's Remanifestation of the Golden Dawn System's Degrees within the A.'.A.'. In ”One Star In Sight” Crowley writes of the Aeon Enhancing Magus:
This does not mean that only one man can attain this Grade in any one Aeon, so far as the Order is concerned. A man can make personal progress equivalent to that of a "Word of an Aeon"; but he will identify himself with the current word, and exert his will to establish it, lest he conflict with the work of the Magus who uttered the Word of the Aeon in which He is living.
The functions of an Aeon Enhancing Magus is to provide a means of modulating, focusing, and filtering Xeper's infinite capacities. To use the linguistic metaphors we have been working with thus far the Work of an Aeon Enhancing Magus can be seen as presenting a specific conjugation of the Primary Word of the Aeon, or providing an Object for its actions.