I see a lot of monsters hanging around faaaaar too long to get a strike on the medic/support.
However, at a stage 2 or 3 fight, this strike holds a ton of value and can often result in a win, since the medic or support is that much easier to down.
So my question to you is: How much health are you willing to lose for a strike on the medic/support? Where is the balance of staying or cutting your loses and running?
This can of course differ per monster. Goliath can maybe hang around longer while Wraith may want to run away as soon as possible.