Since the creature returns to your hand, you should focus on cards like Agent of Treachery, Skyclave Apparition, and Cloudblazer with powerful enters abilities
While it is true that a few of these cards have now been Masterpieces twice (Mana Vault, Ancient Tomb, Through the Breach), we need only look as far as Mana Crypt and Sol Ring for examples of cards that have had multiple rare and shiny versions that have tended to trend upward together once the Masterpiece started to rise
Barring specific deck strategies, well want to make sure we have a decent ramp of cards to play at each ink cost, without making us too top-heavy
I would also beef up the deck with some gimmicks to ensure opponents have creatures to stomp on, like Varchild, Betrayer of Kjeldor, Combat Calligrapher, Tahngarth, First Mate and Assault Suit