In Darkest Dungeon, I like to arrange battles so that there's only one weak enemy left so I can tank its hits and focus on healing. For example, leaving a weak skeleton around so that I can re-cast stress healing skills on my party that heals more than the skeleton hurts.
The problem is, the game recognizes this eventually by having a random character shout "We should move on!" or something equivalent, which starts stressing my party out faster than I can heal it.
I know that the game doesn't just punish me for long fights. I've had skin-of-my-teeth encounters that have lasted 20+ turns where I wasn't in control of the situation and nobody complained about taking too long. So there's something the game is using to determine if I'm playing with the enemy.
I want to know what that is so that I can figure out the minimum amount of effort needed to artificially prolong fights.