I'm hoping the reveal of the old Amauratine souls comes into play here, and that's only because of the recent mind blowing revelation a friend sent me. Apparently Hythlodaeus has been helping us in their reincarnation since the beginning of FF14, said reincarnation being Y'shtola. Now I'm not sure how they could fit it in, but if Emet comes into play, or if we need to find him to get him to help us for whatever reason, we know we have the person for the job.