I’ll just add my personal 2¢ to your great post.
Ra speaks all too often that if we want catalyst for spiritual advancement and harvesting, dealing with other-selves are where it’s at! The mother lode! .
Apparently getting exposure to other-selves in a 3rd density and veiled environment is a major inducement for higher density level beings to go for “wanderer duty” and reincarnate to get a catalytic “jet pack” for moving ahead in their own spiritual evolution and development.
I don’t have the Ra quotes handy but I highly recommend Gary Bean’s masterful chapter in the Concept Guide chapter called “Catalyst”. (A free pdf download from llresearch.org). He has lots.