Help with Urza, Chief Artificer deck

Hi! I'm looking for some tips for my Urza, Chief Artificer deck, like cards to cut and to add.
Here's the deck: https://moxfield.com/decks/D3acReEgVEKEixY6I7g82Q

First of all, I want to keep it around power level 3, since that’s the range my playgroup usually sticks to.

Gameplan:

• Build a big army of Constructs using Urza, Chief Artificer, Digsite Engineer, Urza’s Saga, Simulacrum Synthesizer, and Urza, Lord High Artificer; then copy them with Tawnos, Solemn Survivor, Olter Matterweaver, March of Progress, Drafna, Founder of Lat-Nam, and Mondrak, Glory Dominus.
• Generate lots of artifact tokens (Treasure, Blood, Clue, Gnome, etc.) to boost the Constructs’ power.
• I like to control the board with plenty of removal and counterspells (I also play against an Ygra deck, so I try to counter it every time it’s cast).

Win conditions:

• Make the Constructs huge, sacrifice them, and mill opponents with Altar of Dementia.
• Use Mechanized Production on artifact tokens and copy them for the win.

Thanks!