It doesn't seem like you have much protection or control. Even if your Champion of the Parish was beastly, that doesn't mean they couldn't just simple destroy it or exile it after all your hard work. If you wanted something cheap and easy for defense, I'd recommend running 4 card:Faith's Shield.
Also, other than the two Drogskol Reaver s you have, your mana curve is pretty low. I think you could get by with dropping to 22 or 23 lands, which would give you a little more room for something else.