Okay, so I think its a good thing Incendiary Cloud does more to targets. However, in increasing the damage per round, I think the duration of the spell should have been reduced to 1 round/3 levels. Otherwise, creatures that you have managed to impede movement (Hold, Black Tentacle, Forcecage, Entangled, locked in a room, etc.) are in a LOT of trouble in a short time. Reducing the duration should keep the overall damage about the same, but the increased per round allows you to dish it out quicker and more effectively.