A few things you could include to help increase preformance:

• Ancient Den , Seat of the Synod , Vault of Whispers and Darksteel Citadel . These all help with Tezzeret, Agent of Bolas and if you ever get a Tezzeret the Seeker then they are a free fetch. Speaking of which...

• Tezzeret the Seeker . He is a repeatable tutor. and ramp. and fallback beatstick mode if you need to.

• Plague Myr . He gives you ramp, an alternate win con and a sac outlet from Arcum Dagsson Especially since you only have 6 artifact creatures currently.

• Gilded Lotus . In my opinion it's much better than Thran Dynamo .

• Render Silent . Really brutal counterspell and you can shut down control players on the turn you want to combo out.

I also like things like Cranial Plating and Etched Champion but thats more of a combat heavy direction for the deck.

I recently added Krark-Clan Ironworks to my sharuum deck. I was reluctant about it at first, but it turned out to be a great card. My main reason for trying it was for another Thopter Foundry /sword combo...but it helps to give you that additional ramp in a tight spot to pull another combo off.

No Mindslaver It is pretty much a staple in Artifact edh from what I have seen.

Evolving Wilds , Terramorphic Expanse , Liliana Vess , Crawlspace , Darksteel Ingot , Mana Web , Obelisk of Esper , Quicksilver Amulet , Underworld Dreams , Rune-Scarred Demon , Blind Obedience , Nevermore

Swap out:Island , Swamp , and Plains for Ancient Den , Seat of the Synod , and Vault of Whispers .

Liliana Vess for Tezzeret the Seeker

Mana Web for Ethersworn Canonist

Crawlspace for Copy Artifact

Quicksilver Amulet for Transmute Artifact

Underworld Dreams for Beacon of Unrest

Rune-Scarred Demon for Reshape

Blind Obedience for Mana Drain

Darksteel Ingot for Render Silent

Nevermore for Mana Crypt

ideas