Has anyone looked into using Leyline of Sanctity as a card out of the board? The double white makes it not terribly castable later, but it helps stop quite a few combo decks right from the get-go as well as hand disruption, while also stopping edict effects. Seems like it might be worth trying, especially in a version that just tries to turbo out the combo right away without worrying about the long game (i.e. a deck with petals/ESG rather than diamonds and libraries).