Frost spec DW heirloom

If I go frost DW for weapons should I use the agility/crit 2.8 sword and then 2.8 Parry sword?
Yes.
No. Use 2 agil maces. they give haste which really helps out the build all around. The agil part doesnt matter till 80 anyways, this is how i did it and was literally blowing EVERYTHING up till i hit cata content and had to switch weapons.