While learning how to play Magic: The Gathering is important, its so much more gratifying to win when youve put the deck together from scratch
Another silly possibility is attaching Grafted Exoskeleton to Hydra Omnivore, which deals damage to all opponents when it hits one opponent
Illusionist's Bracers Illusionist's Bracers goes infinite with creatures that tap to untap things, like Aphetto Alchemist
Assault on Osgiliath Assault on Osgiliath isnt an amazing amass card, but it has implications for goblins
Just watch out for certain Exile spells like Swords to Plowshares or Vraskas Contempt that would make recasting Optimus more expensive (the Commander tax applies to both sides), or other annoying blue cards like Capture Sphere that doesnt kill him but does prevent attacking and blocking
Since Glen Elendra Archmage is a creature, it's also much easier to retrieve from the graveyard than a typical counterspell, with any creature re-animation effect putting it and its threatening counterspell back into play