This decklist also has an alternative way to win via Thassa's Oracle if your library is nearly empty, which dredge enables
There was a sweet spot for balancing the "hero" decks in the original Archenemy that often required a little bit of iteration to nail down, but now you can go straight into balanced four-player Archenemy games right of the box
Notably, Triumph of the Hordes is an excellent Overrun effect with the added benefit of granting the infect keyword to creatures that don't have it
I would be inclined towards replacing them with looser cost cards
My suggestion was a Coat of Arms for Slivers
You won't always be able to play Gadget Hackwrench, Perceptive Mouse, shift her into Brilliant Boson, and get three items into play - especially when Hiram is busy banishing your items - but when the pieces come together, it's important to take advantage