Heck, don't even bother with the feat. Just automatically let everyone go back to full hit points one minute after the fight's over.
Or go one better still and just make characters invulnerable. They never lose HP to begin with. With god mode activated, there'll be no risk of downtime at all. What's the downside? Most encounters aren't desinged to be genuinely deadly, they're just designed to wear characters down and kill time until the climactic battle, and it's already decided that wearing characters down is a bad, boring thing. Even if they're invulnerable, they still have to polish off the opposition, so the "killing time" requisite is fulfilled.