[Pre-BB] MapleStory Formula Compilation

That makes it even less significant, then. If a mage can 2HKO with an ultimate, what does it matter that 2 or 3 of the hits critical for 99999 damage? He'd still have to cast it again to clear the other 12.

Consider the case that there are more than 15 monsters on the map. Or even the case that after killing 2 or 3 of the 15, 2 or 3 more will have the chance to spawn sooner since they were killed earlier. It will increase experience gain, though probably only marginally in such a scenario, but if there are indeed more than 15 monsters on the map, it would yield ideal results.