This looks a lot like my Myr combo deck (albeit with different everything, but same idea of infinite mana Rube Goldberg using artifacts). Considering that, are you sure you want it in mono brown? If so, then running
Kozilek, the Great Distortion for the control aspect might make your early game easier, though you'd have to find another draw outlet later on. If you're not sold on mono brown, then you can run the exact same combo in Thrasios/Silas to get recursion and a draw engine.
Even running Alela can be a big help in my experience, as you can use the faeries as chump blockers or grind them up with an altar for mana.
Again though, if you're going for all artifacts, I'm not sure how much better this could get. I made a Kozilek eldrazi tribal a while ago, and it was terrifying once it got going, but it always took 5-6 turns to really do anything. If you're open to colors, even something like
Memnarch can be run with very few colored spells/lands.
EDIT: In my experience,
Sensei's Divining Top and
Mystic Forge are invaluable for filtering, but I'm not sure if you count those as more combos, especially if you decide to run
Clock of Omens (also amazing) and other untap options. You could run
Karn, Silver Golem and use
Voltaic Construct for untapping.