the ambassador's multi hit ability had been a great farming tool for me, as everytime it brings an enemy below 0 hp, it applies score and exp.  I have not been able to successfully apply this consistently yet, but the implications are obvious.  Multiple genie, pope and satan kills can be achieved, completely breaking the game.

opinions: as it is, exp is applied whenever an enemy drops below 0 hp.  Mlti hit is a great ability, and I would not like to see it removed.  One possible quick fix is to apply exp after the turn is ended, for all monsters below 0 hp.  Death can be applied before, to prevent undead monsters from hitting you after you kill them, but applying exp after allows as many hits as happen to bring an enemy as negative as they get without risking double or triple application.