Why is LOO the purest spiritual source?

[anagogy]

It's interesting to note, though, that Jim wasn't even there when Ra first came through. So, I'd argue that maybe it had less to do with the specific individuals and more just to do with the energies brought to the table.

That is a valid point.

BUT, I would also argue that having conducted their search in time/space, for a group harmonic matching their paint chip, they knew the programming of the incarnation, and knew Jim would be showing up soon to stabilize the energies being channeled.