Quote Originally Posted by Akoko View Post
The T12 set bonus causes Arcane Power to REDUCE the cost of your spells by 10% rather than increase it by 20%. This is going to be hilariously awesome for you guys' mage teams :P
T11 4set then again reduces AB casting time by 10%, so can drop some haste off and get like mastery instead -> more dps in less time while the mana costs remain the same.

3 pieces will be purchasable with justice points from tomorrow, just need to figure out how to get the 4th piece times ten..