Looks good! I feel like card draw may be a a weakness of your deck. If you could get a Sensei's Divining Top or Scroll Rack that'd be great (since you already have half of the engine with Land Tax).

Since you have Helm of the Host you can add Combat Celebrant as a second way to get infinite combat steps aside from your commander. Giving Combat Celebrant vigilance also removes the downside of the exert ability!

You can run a lot more tax effects such as Blind Obedience and Thalia, Heretic Cathar to complement the tax effects theme you already somewhat have.

If you're going to run Gisela, the Broken Blade  ^Meld without Bruna, the Fading Light  ^Meld, then I feel like you may as well run Baneslayer Angel instead. For 1 more mana, you get 1 extra power, 2 extra toughness, and protection from demons and dragons

Right now you're running a heavy amount of artifacts that have no tap abilities, so you could make excellent use of Inspiring Statuary! It's a very niche card but it fits well here because you run lots of non-artifact spells!

Godo, Bandit Warlord is a voltron staple because he grabs you an equipment when he hits the field, and he gives you an extra combat step for all your vigilance creature and samurai! Goes really well with Helm of the Host as well

I also noticed you're not running Inventors' Fair? Seems like a no-brainer inclusion to me

Inventors fair. Great call, not sure how I missed it.:)

Play tested Mask of Memory, and my card draw is on point.