A theory: In reference to the "one of the two prototyped dead selves god-tiering", if you relate it to Jade's "Dog Tier", I would think the one who god tiers would take total control of the body, but would still have impulses that the other person would have, perhaps emotion as well (but not as much as before god-tiering). I don't think they could God Tier a second time, since the other personality would be wiped, and they would no longer be a main part of the "sprite".