Dont need a parser to sovle the problem.

Its quite easy. Up the mob damage in suc a fashion mass pulling will wipe out the tank. Meaning, You can pull 3-4 Monsters and the tank can survive a certain period of time so long as healer is decent. But if it takes to long to kill those mobs, its a wipe.

You can implement this simply by having mobs hit harder the longer theyre in combat and the more mobs are in proximity. This damage boost is permanent to the mob until it resets or is killed.

If DPS cant burn down mobs fast enough, tis a wipe. If tanks dont know how to tank well enough, its a wipe. If healers cant keep tank up, its a wipe. Essentially, make it easier to wipe if clearing mobs takes to long, and discourage mass pulling.