I need some help improving my Magic the Gathering Deck.?

although cho-mano/pariah is a powerful combo, it is utterly useless against 5 color controls wrath of gods. the deck has been known to cringe at manlands (i.e. mutavault) if you think maybe you can trade into some. other wise, you look well equipped for the 5 color match up. you have path to exile and story circle to handle their light threats so the only real issue seems to be how to overcome cruel ultimatum. again the answer is a little money hungry, but discarding wilt-leaf liege into play is a fantastic option. i can't think of any other ways to quell the devistating sourcery. hope you find help here.