Some nasty sweeps you got there ;). I like it. Depending on your limitations you might consider Land Tax instead of Gift of Estates, same thing, 1 casting cost. I built something similar except currently standard legal. http://www.mtgvault.com/ViewDeck.aspx?DeckID=80865
Permalink
^^ This, Vengevine is ridiculous.
Infectious Horror: Big brother to Pulse Tracker, truly obnoxious.
I smell stompy goodness here. Uber expensive but I understand that was kinda the point ;) I don't really have any suggestions unfortunately, except maybe forgoing the eldrazi monuments as your creatures should be more then enough to overrun the other guy's army.
Maybe wall of reverence instead of angelic chorus? Then you get a blocker and gain life every turn at the largest value on the field, and it costs the same! Only downside I think would be that it is now subject to much more removal, but if you're playing with anyone with a fairly well rounded deck they should have an answer to an enchantment at least sideboarded right?
Felidar Sovereign would be a bomb worthwhile looking at for this deck, if we are truly abusing having waaaaay too much life XD.
Dawn Charm might be an interesting addition. Interesting build overall. I've been wanting to abuse Luminarch Ascension for awhile. Cool beans.
I don't know why wall of reverence isn't in here. Flying, 1/6, you gain life equal to power of creature you control. Granted it won't be extremely effective until you see a cradle of vitality hit the field, but I think its still totally viable.