To do the skip in any%, get all 4 remains and leave to the map in order to reach the giant cutscene. Wait for what feels like twenty years until he tells you that he taught you the oath to order while you were asleep. Now, click just off the bottom of the screen where the Talkarina would be if the bottom bar was there. The menu will pop up: Now this is the hard part. You need to keep clicking to close and reopening the talkarina so the Oath to Order is present in the bottom right rectangle. If it isn't there, close and reopen until it is. If you're too early you may accidentally not notice and close out, but if you're too late then you may close out and then not be able to open it again, as the cutscene as begun. Keep trying until you're able to get it successfully, and then you can put in the oath to Order asap and you go to the end cutscene instantly.