personally I've gone hit/exp to cap, MAX crit, haste to 3040+ rating, mastery, haste (past cap). I've had better than expect results after the nerfs, topping the meters 3 out of 5 fights last night. the two fights that i didn't top the meter, i died once and the other was sha of fear which the meters are always fucked up.
Why would you built a spec around one spell that does at the current state 10-15% of you total DMG? Hell, even in the unnerved state it was only max. 30%. You dont play a fire mage this way. Its the same stat priorety as mentioned above CRIT, haste to 3040+, mastery