Swiftboot boots also for just to make having your commander protected more likely? Char doesn't seem that great although I suppose I could be wrong, replace it with Dreadbore maybe? But I feel like you definitely need Maze of Ith so that you can swing w/ Kaalia into higher power and get her trigger but not have her die.
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Deck looks pretty solid, got room for the other Elspeth? I prefer her personally. Graveborn Muse if you want some redundancy for the phyrexian arena. Luminarch Ascension :D
Primeval Titan is banned now so unless you have house rules to unban it might wanna take it out. Not a big fan of holy day - Green Sun's Zenith or Chords of Calling or Swords to Plowshares instead? Same with Fog. Since you're using both Norn's Annex and Ghostly Prison add in Windborn Muse maybe replacing the prime time since you (probably) can't use him anymore. Maze of Ith over most likely an island, maybe a Halimar Dephs but it coming in tapped might hurt too much not sure how much of a problem you have with spped. Priveleged Position over Greater Auramancy? Its a bit more mana intensive but it affects more of your stuff - also hexproof over shroud. I don't think phyrexian unlife really deserves a spot either. Instead of that maybe you could put in Enlightened Tutor which works well with Djinn of Wishes if you have it out or Sterling Grove or Idyllic Tutor. Other good cards could be Stoic Angel, Gaddock Teeg is a possibility he really hoses some decks, Phantasmal Image is great.
Why Darksteel Colossus over Blightsteel Colossus? Not sure how often you hardcast your creatures with a deck like this but Winding Canyons maybe? Also you run quite a few less lands than most edh decks I see, do you not have mana problems with this?
Bit too many lands...
Board wipe could be useful for an oh shit moment; I'd probably use Plague Wind but Damnation is also a good choice. I'm not sure you have enough spells to justify using Dralnu either. Also Urborg, Tomb of Yawgmoth works great with Cabal Coffers, so I'd advise using both of those. And since you're zombies have you though about Grimoire of the Dead, only thought of it for flavor reasons but it could be quite good :P.