This is my proposed decklist for a multiplayer game. Any suggestions on how to improve it would be welcome. Sometimes I make decks just to use a certain card, in this case, that card is Master Transmuter

Lands - 20
4 Seat of the Synod
4 Ancient Den
4 Glimmervoid
4 Vault of Whispers
4 Darksteel Citadel

Creatures - 34
4 Cathedral Membrane
4 Steel Wall
4 Vedalken Engineer
4 Etherium Sculptor
4 Master Transmuter
4 Master of Etherium
1 Filigree Angel
1 Inkwell Leviathan
1 Sundering Titan
1 Memnarch
1 Nullstone Gargoyle
1 Phyrexian Metamorph
1 Steel Hellkite
1 Wurmcoil Engine
1 Sphinx of the Steel Wind
1 Platinum Angel

Spells - 7
2 Darksteel Ingot
4 Fabricate
1 Darksteel Forge

Basically, I try to hold off an attack with the walls until I can get a Master Transmuter out and then start dropping big artifacts. If I cannot get a Master Transmuter in play, I still have the ability to hardcast any of the big artifacts, also the alternative win condition is Master of Etherium. Any suggestions on what to add to make it better?

Thanks for your time,

P.S. And yes, I always play with a 61 card deck.