(As English isn’t my native language my apologies for poorly structured sentences or spelling mistakes
)I would choose City of Traitors without a doubt, not only because you play Crucible but also getting to 5 lands with smokestacks and wasteland is difficult to nearly impossible and you want your mana ASAP before the game is over.
If you want to cut the blue and red from your deck and go mono-brown (the ugly grey nowadays) there’s another great (inexpensive) mana accelerant for you namely
Metalworker. Playing with Metalworker gives you an
explosive start. The midgame isn’t in your favour but with this deck (more so for the powered version) there normally wont be much of a midgame, a two sided that is
The list for the powered version can be found here:
http://www.theabyss.biz/2004/winners/winnersmilano10.htmHere’s a “budgetized“ version at the top of my head that might stand a chance against the tier 1 decks
Main Deck// Mana (26)
4 City of Traitors
4 Ancient Tomb
3 Crystal Vein
4 Wasteland
1 Strip Mine
1 Tolarian Academy
1 Mana Crypt
1 Mox Diamond
1 Lotus Petal
1 Sol Ring
1 Mana Vault
1 Grim Monolith
3 Mind Stone / 3 Basalt Monolith// Creatures (11)
4 Metalworker
3 Karn, Silver Golem
3 Triskelion
1 Sundering Titan
// Locking Parts (20)
4 Trinisphere
3 Sphere of Resistance
4 Chalice of the Void
4 Smokestack
3 Tangle Wire
2 Uba Mask// Other (3)
2 Crucible of Worlds
1 Memory Jar
Sideboard 1 Triskelion
2 Duplicant
1 Tangle Wire
3 Damping Matrix 2 Defense Grid
2 Uba Mask
2 Kill Switch
2 Tormod’s Crypt
I don’t know what to play in the
Mind Stone/Basalt Monolith slot. Although Basalt Monolith gives you more mana, you can play the Mind Stone’s turn 1 as they cost 2 and have the ability to draw you an extra card later in the game. Maybe there are even better choices but this is the best I can come up with now.
With 11 lands that give you 2 mana and 6 artifacts costing 0-2 mana that together can give you 3 mana turn 1 a
first turn Metalworker or Trinisphere isn’t a rare thing. If you want to you can add
Serum Powder (in the Mind Stone/Basalt Monolith slot perhaps) to increase your chances for such a turn 1 play.
Playing without Goblin Welder and only a few 2CC artefacts, you can easily set a
Chalice for 1 or 2. Chalice for 0 will obviously help you against the expensive jewellery

and the now popular Engineered Explosives.
Uba Mask is great and a must counter for many decks as IMO it totally wrecks Control, Tog, CS (especially Toadi Slaver), … only against Workshop decks they are mostly a dead card but against those matchups you have Kill Switch in the SB.
Playing without Welder and Metalworker being a mana ability, you have the additional advantage to run
Damping Matrix in the side. It “only” hurts your Karn, Triskelion and Memory Jar. I usually, though I could be wrong about the Jar, side out 1 of each for the 3 matrixes. When your opponent is in a lock you can sac the matrix to Smokestack and swing for the win with Karn and his friends.
The rest of the deck and SB are your basic stax parts and are self-explanatory.
If you are keen on playing Mr. Welder you can add 4 mountains and some fetchlands but IMHO you don’t need it and it would only ruin a faster mana base (even more).
Good luck with your deck.