Today, at level 65, I crafted my first piece of the Shadow's Embrace set Frozen Shadoweave Shoulders. I'm still 5 levels off using them but at least having them now means that I spend less time farming for motes and netherweave for zero XP later.
Lets be real, you have two choices when it comes to getting the matts required for this set. Farm them or buy them. I was lucky enough to have a level 70 rogue miner to assist in my plundering. Which ever way you go, for the best set applicable to a Shadow Priest, the time you put into this set will be worth it in the end.