I failed to protect Isobel as Durge, yet somehow the game thinks I killed her. Sceleritas didn't show up for the entirety of Act 2. Do you get the Slayer only if you kill Isobel during a long rest or also if you betray her when Marcus shows up?
seems like you may be experiencing a bug if he didn’t show up at all. 😭 he’s supposed to show up before you meet her or if you went to last light inn and didn’t speak to her yet. He’ll tell you to kill Isobel for a prize. Marcus vouched for me at last light inn so I was on his side. But when the battle happened, he was an enemy since durge needed to kill Isobel before he takes her alive. After that I just long rested and got this cut scene.