I am starting to think that jewelcrafting might be a good option to pick up. Granted they don't have epic gems listed for wotlk yet but if you look at

http://www.wowhead.com/?item=42144

This almost does 2 things for you. It gives you more spell power and also counts toward a blue gem for meta gem/socket bonuses.

Now the question is what does Unique Equipped: Prismatic Gems (3) mean. Can you have 3 of these equiped in your gear? If so I would argue that Jcing is looking really nice.