For a slightly different take you can check out my proposed list, http://www.mtgvault.com/ViewDeck.aspx?DeckID=346924 I should say I haven't playtested this specific arrangement yet.
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I haven't played with your deck at all, so maybe I'm off in this remark, but it seems to me like this deck is likely to be too slow or fragile (too slow vs. aggro and too fragile vs. control) to be "tournament quality." I have playtested with Reassembling Skeletons before and found they tended to be too inefficient mana-wise even though they seem great for card advantage, for instance. If you just want to build a combo deck (rather than seriously trying to win tournaments), have you considered trying to build a deck around the Necrotic Ooze + Grimgrin + Bloodline Keeper combo?