With the recent changes made to mana drain mechanics, I wonder how these will affect raiding.
For instance, if they made Mana Burn destroy 2.5% of someone's maximum mana I would be ok with that in PvP. However, if it remains consistent in raiding... then we got a problem.
Kael'thas Sunstrider has 330,900 Mana. At a flat rate of 2.5% that means Mana Burn would destroy 8272.5 of his mana and deal 4136.25 damage. Mana Burn untalented is a 3second cast, so that is 1378.75 dps... talented it is 2068.13
I hope they make it PvP only and do something different in raiding.