It is, but so are not getting mana flooded and finding the missing pieces to your lock which whir does pretty easily. I play tron and easily win if my opponent doesn't interact with my hand. It's not that I think
darksteel citadel is bad, it doesn't do much except get metalcraft turn one and after that it's just a colorless land. You still need to go down on mana sources, you're at 28 and you'll start to
flood on turn 4. You could use wielding jar instead to turn on metalcraft on turn 1