I don't know in which order you killed the innocents but #3 was seemingly good since it was saying #6 was a real bombardier (which was very likely considering it's the only visible outcast and the deck is saying there's one outcast). That would only leave you with #2 and #4 and now it's really just guessing and it's unfortunate that the witch was the unrevealable card but that's how it is. You also could've saved the Fortune Teller's power earlier on for this since when you have few cards that allow you to choose it can get hard near the end.