Play the biggest fatties and win. This deck is pretty combo-y so if pieces don't line up it can be very slow and durdley, but the things you're doing are sweet! The big thing is, if you're struggling to fill up the yard and reanimate, you can Madcap Experiment something out too, without the enchant, it's a risky play but it can be huge.
This is a reanimator deck primarily, but you can hard cast everything but the Metalwork Colossus pretty easily, if that's your plan though, staying alive can be tough. You have a lot of discard/card draw to help fuel the reanimator strat. Ideally you turn 2 or 3 Tormenting Voice or Cathartic Reunion getting a fatty in the yard and turn 4
Refurbish
it. once your big stuff is on the board, they're hard to deal with as most non-exile removal can't deal with them.
Consulate Surveillance
+ Madcap Experiment is a fun way to cheat in big stuff too. Plus,
Consulate Surveillance
can keep you alive for a turn or 2 when you're in a bind. Make sure you have land and card draw though, that's the key to the deck.
If your opponent doesn't have countermagic or a very fast clock, you can set up fast and a turn 4 big guy often just wins.
Sideboard is guesswork still. The Unlicensed and Cut / Ribbons both give removal and burn which is solid. Nahiri, the Harbinger and Fling are the two that excite me and big Chandra is amazing, it brings board wipes up to 6 total, refills your hand and puts fatties in the yard, and can attack.
I thought about Key to the City I haven't had time to test it. The upside on it is it pushes your damage through, fills your yard, and can draw extra cards. The downside is hitting that on Madcap Experiment could keep you from stabilizing. I think I might do it anyway, shaving a Cathartic Reunion and a Madcap Experiment.
