It's still more efficient than having the chain casting wizard from the tank WoTLK Gold. If your tank is holding W in this manner, then you'll need to be burning through lots of mana simply having to chain cast Blizzard while he's moving and then you'll have to blink in order to catch up, and so on.
Also, depending on what your guild is doing Wk and through Max Don't be scared to stick with Tanks and Arcane Explosion while you go. It's going to do good damage.
Also, in the event that the bombs stand still, and will be around for a while. rank nine to rank eight and into blizzard. use that palm Blizzard tricks to buy WoTLK Gold gain the arcane power and pay attention to the clear casting instructions using your Blizzard to benefit from the arcane power as well.
