I know there there might not be such a thing as a cookie cutter spec anymore, but I doubt the average raiding spec will differ very much.
My questions is how you plan to set up your spec and what glyphs you plan to use as fire. So far I've only been running instances as fire, but I'm having severe mana problems, and at least for an entire boss fight, molten armor doesn't seem to be an option, as you will simply run out of mana. Then again fire with mage armor feels a little wrong. But what are you plans? Lets see it.