Noted. >_>
EDIT: Incidentally, while not identical, the champion preview I showed has options for dealing a lot of AoE damage in clusters of enemies. With the right investments, they can spread diseases in AoEs around all their disease targets, then spend a major (standard) action to force a test against the disease, and then everyone that takes damage from the disease goes boom for 1-5d6 damage in the AoE of the disease spread range. If you've got a cluster of foes nearby, the damage can get fierce pretty rapidly (for example, if you're 4th+ level, foes deal 2d6 damage in a 20 ft. radius when they suffer from your disease, so if you have 3 guys packed in a 20 ft. area, they'll make an explosion for 6d6 damage to anyone in the overlapping AoEs).
Mages using fire magic will probably have similar options (turning burning enemies into walking AoEs).