There are a couple cards that are missing out big-time. First, and far most obvious, is
Sorin. Sorin is one of the best cards in EDH (compared to how good he is out of EDH anyway), for his first ability zaps chump blockers or your opponent and gets you a small amount of life, his second brings your opponent down to TEN life, and his final (though you've probably won the game by the time you use it

) is
Mindslaver, which is epic in EDH if your deck can afford it. Also, Sorin is not really that expensive any more, and nearly every dealer has at least one that they're willing to trade.
Also not sure why Malakir Bloodwitch is missing. She is AMAZING in a tribal vampire deck, especially if you're facing a white general.
Finally, in the land base, this is one expensive card, but
Dark Depths. You not only run the
Hexmage, you also even run
Hex Parasitetoo! Not to mention that Dark Depths can win by itself sometimes too.