Okay, so on to our main differences:
Arcbound Crusher. He was in my original build a little over a year ago. I ended up cutting because he just didn't seem good enough; it was more of a "win later" or "win next turn" card. It seemed like alot of work to get a creature that ended up around the same size as a
Master of Etherium. Originally I had
Inkwell Leviathan in this slot, and I did like him, but ultimately he was just a beater, and while he was awesome in 2-3 player games it got progressively worse the more people that were at the table.
Sphinx Summoner. Always seemed like a just a 5 mana restricted tutor to me. I would rather drop a huge threat like
Master of etherium.
Sanctum Gargoyle. I usually want to get as many of my artifacts from my hand to my graveyard as possible. This just seems like undoing most of my hard work.
Kederekt Leviathan: What can I say, triangle man is awesome. Drop him, windfall for a ton, and watch your opponents grown. Of course then you become THE default target.
I do play more draw than you and I have to say, I am very surprised that you don't play:
Fact or Fiction,
Mind's Eye, or
Windfall. fact and windfall are GREAT ways to get desirable artifacts into your graveyard, and mind's eye is just some of the best draw in EDH, and endlessly abuse able in Sharuum.
protomatter powder is a one for one trade for 5 mana, so I never really considered it.
Salvaging station: this card is incredible, especially with
Voyager staff. Of course any other cogs, like
Aether spellbomb,
Executioner's capsule,
Dispeller's capsule,
Tormod's crypt, or
Expedition map are also awesome with it. Aside from using Station/ Staff to blink Sharuum (and that is great), its also a self-reinforcing combo with
Trinket Mage: blink him with the staff to get all of your 1 cmc artifacts in your hand.
I used to run
Reito lantern and usually liked it, but I found that I was using it as graveyard hate as much as anything else. As I said, I want to include
Emrakul for graveyard recursion as well.
Rings of Brighthearth are awesome since the deck runs SO many activated abilities.
Counters. Sometimes you just NEED to hinder
Uril, or
Omnath. Sometimes that
Timestretch just needs to be
Dissipated. I only run 5 because I don't really have room for more (though I would like to run 1-3 more), but I do like having a few "no"s in the deck.
Glassdust hulk is completely unnecessary if you have
disciple of the vault, since you just won the game.