Has anyone thought about adding Ancient Tomb ?
It could solve the tempo problem that will arise once we start dropping Vial and the affinity creatures.

This is a list i am currently thinking about. It have done no testing with it so far but i intend to.

//19 Manasources
4 Seat of the Synod
4 Great Furnace
4 Ancient Tomb
4 Darksteel Citadel
3 Mox Opal

//24 Creatures
4 Memnite
4 Ornithopter
4 Steel Overseer
4 Arcbound Ravager
4 Etched Champion
4 Master of Etherium

//17 Spells
4 Thoughtcast
4 Cranial Plating
4 Galvanic Blast
4 Shrapnel Blast
1 Tezzeret the Seeker

There are no one mana creatures in this deck so Tomb helps out to get those two and three mana guys on the battlefield early. It still got a problem with all the colored spells since none of them will use double colorless mana.

Tezzeret is there just a a late game option. Not sure how good he can be. But i want to try him.

The deck might be way too slow. But it does not sound that bad. Only testing will tell.