There are a lot of games where the combat will end when the boss takes x amount of damage or only has y% of hp left.
I would be happy with the immunities that FRUA had being up and running.
There is the 'party cannot die' box that can be checked, all we need is a monsters cannont die box and box to have combat end when a condition has been met.
BTW, all the official lists are at Sourceforge.net.