Here are some spec ideas i have been messing around with. Tell me what you think.
Frost - http://ptr.wowhead.com/?talent=j0EMZhxx0AbI0f0iost0g
Blood - http://ptr.wowhead.com/?talent=jcEGVhhIcb0fssZhxZ0gh
Unholy - http://ptr.wowhead.com/?talent=j0EMZhxZbghIx0zgI0ocoux