Originally Posted by
Tinyknight
On my PTR dummy testing I was able to use consecration whenever it was off CD and I had a free global. My mana would drop to around 50% and be back at full by the time another opportunity to use it came along. I had it glyphed simply because I had no other glyphs on that slot (not a premade char and no glyphs on the AH.)
So yeah I'm not entirely sure what Requital was getting at, sure the damage is pathetic but there are plenty of free globals and pathetic damage is better than no damage.
I am not sure if the increased mana cost of stuff like CS has been implemented on the PTR, so you may not have the mana by the time cata ships. Also I wouldn't do it on anything less than 90% mana lest you run into mana problems, but if things remain as they are on PTR I don't see why I wouldn't get a couple of casts off per boss.