You could side in Duress to protect your investment, or you could cut Irencrag Feats and try to grind more either by adding slightly less expensive threats like Valki or Ashiok, or you could add Mazemind Tome or Expressive Iteration for card advantage
But you do have to wonder how the visual theme would be handled if other enchantments were chosen instead
Ive long been an advocate of banning several Reserved List cards, including the dual lands from Legacy for (wink wink) power level reasons
At the time of this writing, you can find a mint condition Gold Mega Gardevoir ex priced at $1,200 on TCG Player
Players can even find this Pokmon card going for as little as $80 in Near Mint condition
Itll come into play off of an Urzas Saga, too, which is sweet