Talk:AFK / Overnight AP Farming
Another thing that can interrupt your AFK session is Prompto asking which about which person you want to see more in the photos, because the game will prompt a message box that has to be dismissed by pressing X. So, I would add to the requirements "Wait until Prompto inquires about who you want to see in the photos before going AFC (away from controller)".
I successfully left the game running overnight for more than 6 hours without any other interruptions popping up. However, if one is attempting this before finishing all photo shoot side quests, Prompto might interrupt the trip asking to stop for a photo opportunity (as I believe the default answer is 'Sure').
Yet another of Prompto's annoyances that can interrupt your AP farming is him requesting to stay in a hotel when you approach an outpost. I do not know exactly what prompts Prompto (no pun intended) to ask for a break-time, so I cannot propose any strategies to eliminate this potential hindrance.