So in my 25 man run of Onyxia today I verified something that I had noticed previously. I'm a shadow priest, and I started mind searing one group of the whelps before both were brough together, and it was hitting for the usual around 1400. When they were brought together and there were twice as many mobs, it started hitting them for around 800. Recount confirmed this. My highest mind sear hit was 1471 and my average was 798. My highest crit was 2206 and my average crit was 1212. This also happened to a rogue in our group, whose fan of knives averaged 400 and had a max of 800. These numbers are all coming from recount.
Even more confusing, a mage who was casting Blizzard, a warlock casting Rain of Fire, and a druid casting Hurricane did not have the same effect, at least according to recount. Is this some sort of stealth nerf done to priest/rogue aoe since it was so strong at one point? Or is it just a random bug?
Post your thoughts. If I figure out how to take/upload screenshots of the recount page I will try to.