Help with my Urza deck !

Hello ! I currently have this Urza, Chief Artificer deck that I need help with : https://www.moxfield.com/decks/IysOOXgq60qcwKGoXJbwlA

The deck is doing okay in general (will win a couple games) but I feel like it could be more efficient. I'd like to make it higher power as my play group is in general between a 7/8 power level. I know for a fact the land base needs to be re worked as it's mostly stuff I had in hands while building the deck. Any tips on cuts/upgrades and such is much appreciated :) Cheers