Looks like a lot of fun.
With an average CMC of around 3.45 you should replace at least one spell with a land. Realistically I'd go for 35 lands with the hefty mana costs of a lot of your spells.
I'd also personally play
Firemind Vessel over
Thran Dynamo for the color-fixing.
Thada Adel, Acquisitor would be a great addition.
When I play
Unwinding Clock in a deck I always play the artifact lands, so in your case
Ancient Den,
Seat of the Synod,
Vault of Whispers. Of note
Tezzeret the Seeker can [-0] to get one of these lands, and also
Trinket Mage can search for one as well. This is nice in that
Trinket Mage can get you a colored mana source, rather than just colorless at times.
If you can afford them I'd also play
City of Brass and
Mana Confluence as additional color-fixing.
Easy cuts in my mind are
Elesh Norn, Grand Cenobite and
Wurmcoil Engine. They are powerful cards, but they don't synergize with the deck and you have so much else going on casting your opponents spells as well, that I feel like you are always going to want to cast other spells instead.