Adding a sacrifice outlet to your mana base makes it much stronger than it would be if it was just lands that tapped for mana, especially considering how hard it is for your opponent to interact with it
Once per turn, when an attack is declared involving your "Battlin' Boxer" monster and an opponent's monster: You can send 1 "Battlin' Boxer" monster from your hand or Deck to the GY, and if you do, attach that opponent's monster to this card as material
Its going to take some work, but he goes into great detail on the strategy here
For some reason, Optimus Primes Bolster ability isnt restricted to Artifact Creatures (unlike many of the other Transformers here), meaning he is much more useful in regular Commander decks and not one specifically built around Artifacts
Your mana generation will all be colorless too, so paying the 6 mana wont be a problem
It requires another card to make you become the monarch, which isn't great