Ok so from what I understand I wouldn't be able to get all the endings in the 1.3 playthrough because the backup is created at E4 and there are a lot of mutually exclusivev choices before that, so I think I'll follow Lukatales' suggestion and make a backup before Sigmund. And to think the solution was right under my nose (I might have visited that post in the past lol), sorry for bothering you. If only that guide was in chronological order too Now I just have to decide on the minor choices like losing to Bennett, getting caged etc...