MTG Zombie Deck Help?

Vengeful Zombie seems a little sub par in your deck. Most of your other creatures have some kind of enhancement for zombies in play. Also it is 4 mana for a 3/2. I am not sure what other decks you are playing in casual but most red damage spells will kill it as is. So if you don't have one of the other power enhancing zombies in play a lot of times he will probably be destroyed and only cause the opponent to lose 1 life. I think Noxious Ghoul could probably be cut too. It costs 5 mana and only gives non-zombies -1/-1. By the time it comes into play your opponent either has creatures that are too big to really care or you are winning anyways. If your opponents have some decks that churn out a lot of 1/1 creature tokens you might reconsider that advice. I am not a huge fan of Carrion Feeder. It is a 1/1 for 1 that can get bigger which is good, but most of the time he seems like you will not want to sacrifice your creatures to him. He could be really good if Lord of the undead is in play but otherwise he seems like you will sacrifice your bigger creatures to make him their size, but most of your bigger creatures enhance all of your other zombies too. So most of the time you will be preventing your self from building the zombie swarm you want. I like the number of lands you are playing, but I am not sure cabal coffers is that good as the list stands right now. Your most expensive creature is 5 cost and you don't really play any spells with X in the casting cost. It seems by the time the Coffers really starts producing a lot of mana you won't need it. Some cards I think might be good if you can find a spot for them: Bad Moon has won me several games playing zombies. Shizo, Death's Storehouse out of the Champions of Kamigawa might be a good one of land since you play Korlash HTB. It says tap for one black mana symbol or pay one black and tap it to give target legendary creature fear until end of turn. It is legendary and Korlash is your only target so I would only run 1. A couple spot removal spells might be good to squeeze in there. Sudden Death is great. 3 mana for target creature gets -4/-4 with split second so it cannot be responded too.