Well i was mind searing mobs the other day (not enough to hit the aoe deminishing returns sorta cap thingy). and found that it was hitting like a limp noodle pretty much 100 percent of the time.
I then when and used holy nova on those same adds i had been trying to aoe down with mind sear. low and behold our holy nova spam actually does more damage than mind sear.
Boy oh boy im so glad we got mind sear when a holy spell can do more damage than it.