Originally Posted by
Derpyhooves
As far as I know with the 4 set bonus and making good use of the mind spike + mind blast rotation that mastery becomes more valuable than haste after a certain point. I am sure someone will correct me if I am wrong but if you make good use of the 4 set it is better to be at 2589 haste then reforge the rest into mastery. This value is even lower if you always get DI and/or have the goblin racial. Don't know the numbers exactly off the top of my head but I do believe you could get away with somewhere around 2k haste then reforge everything to mastery.