He wants to be smart with it, he says
So my mind turned to another legend that might be a better fit: Archelos, Lagoon Mystic
While these cards will no doubt give the deck a tremendous boost, giving you even more value every time Arna creates tokens, its more than okay to leave them out of a budget build as this Commander can quickly speed toward a win regardless
Shortly after the launch of Collector Boosters, Wizards would, once again, push collectibility one step further
Each time Mimic Vat makes tokens, of course, it'll be in far larger quantities than before, so the occasions on which Ghosthelm Courier has to bounce itself to stock up on its numbers are going to be few, far between, and getting even farther between with each loop
Go forth, and kill everything that matters while blocking everything that doesnt