STNO

[Siren]

All thoughts seem to revolve around the concept of "service to" and then something. Would there conceivably be a path of service to nothing. That is to say, complete disregard for service as a whole and intentionally striving to be the opposite of service to anyone and intentionally refuse to serve either the self seen within or the self seen without. What would such an entity in the Ra cosmology end up with?

Your mere existence serves a purpose. Were it not so, you simply wouldn't exist. Thus, by merely existing you are already serving the One Infinite Creator—which is your-Self—in some way or another.

Service to nothing would appear to equate to, at the very least, extreme spiritual stagnancy.

If I may, I'd like to say that the concept of stagnancy is literally impossible. Everything is in motion. Growth, progress, evolution cannot in any way be halted—only seemingly so—, slowed down, perhaps (but even the concept of time is inconsequential).
Change is the only constant.