I playing this deck at a tournament with your exact list, but ended up playing a bunch of sac combo decks that wouldn't interact with me and just win turn three. It just doesn't have a fast enough answer a lot of the time, at the time. Playing around though, Suture Priest and Genesis Chamber can work well together.
Was curious as to what you thought of adding Ninth Bridge Patrol as an extra damage swinger, or adding hidden stockpile instead of genesis chamber? It means that you can't get quite the ridiculous combos that sometimes happen with genesis but you also don't provide your opponent the ability to get easy blockers. It would also change your mana base a bit. Also pushing the budget you could add a cavern of souls.
Was curious as to what you thought of adding Ninth Bridge Patrol as an extra damage swinger, or adding hidden stockpile instead of genesis chamber? It means that you can't get quite the ridiculous combos that sometimes happen with genesis but you also don't provide your opponent the ability to get easy blockers. It would also change your mana base a bit. Also pushing the budget you could add a cavern of souls.