What to do with WG Marks

So here's my first dilemma, I've got 35 Wintergrasp marks and some T5 gear. I've basically got two possible options:

1. I can replace Hood of Hexing with Titan-Forged Hood of Dominance
   
2. I can replace both the Boots of Blasting and Belt of Blasting with the Titan-Forged Slippers of Dominance and the Titan-Forged Cord of Dominance

At first it seems like a no-brainer. The WG helm has a meta gem and I know from reading the EJ Affliction post, that that alone is a huge upgrade. The three sockets on the belt of blasting still make it reasonably useful (although worse than pretty much everything epic).

So I plugged the numbers into Excel and found that the belt and boots are better. Why? It comes down to this; the increased hit and spell power on the two items are significant enough to offset the increase from the meta gem. I guess I'll be keeping the stupid looking ZA hat for a little while yet.

DING! I finally hit level 80. Finally, after a swearing a thousand times that I'm not going to level my warlock, I've got my third (and now favorite) character to 80. Now all I have to do is respec and gear up. In mostly level 70 gear (I upgraded a ring at level 78), I've got just over 1800 spell damage and 10% hit in SL/FG spec.