Do what you would with Masterwork of Ingenuity and have a second copy
For quick reference, Archenemy is typically played as a 3v1 game where all players use Commander Decks and one player, the titular Archenemy, has an additional deck of scheme cards, one of which is drawn each turn
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Losing the ability to easily force inefficient play through tempo alone is not worth a greedy mana base, in addition to this there are now many cards that act as good mana dumps for when you are getting flooded such as Spikeshot Elder and Kargan Dragon Lord
For example, if you have 3 Dark Magicians in your Main Deck, you cant put any more Dark Magicians in your Side Deck
1 Iono (Secret Art Rare/Special Illustration Rare - 269/193) And to close the highlight position with the golden key, not being a surprise to Iono to be here, in addition to his competitive side due to the effect of the card, mentioned above