From Reddit: “How is a pagan supposes (sic) to do the abramelin?”
By the power of Metaphor.
You go into it assuming that “YHVH,” “Tzebaoth” and “Adonai” are all metaphors for whichever god(dess) that you do worship, so that when you invoke them you are really invoking your patron deity by another name.
Remember, Dion Fortune once said that all gods are but one God, and all goddesses are one Goddess. Indeed, the Hermetic Qabalah was formulated so that people of different religions could all share in one magical tradition: participants were actively expected to translate the, for example, Egyptian symbolism they encountered in a Golden Dawn ceremony into concepts that made sense to them in the context of their own religion, via the Qabalah.
The modern fancy that you have to stay within the ghetto of your own religion, no matter what, goes against the history of why the western magical tradition was created in the first place.
Source: How is a pagan supposes to do the abramelin? (sic)