Wow. Rain of Gore is great r/b defense.

I like the addition of Braids in a zombie deck.

The deck needs more land (4-6 more) to run more smoothly. Also the deck could probably use the ravnica signets, mirrodin sigils, and the Sol Ring / Command Tower edh staples all of which on top of the need for more land.

Buried Alive to tutor up some stuff, and Wheel of Fortune .

I wrote an article about EDH deck construction here. You might want to check it out.

I would be careful about including creatures that are only useful as beatsticks. For example, Sewn-Eye Drake offers no additional utility to your deck. It's just a bag of meat.

Usually EDH decks run about 35-38 lands. 32 is kind of low. You should also take advantage of mana-producing artifacts like Sol Ring , Thran Dynamo , Gilded Lotus , etc.

card:Ashnod's Altar and Attrition are good sac outlets.

What exactly is the goal of your deck?

What is your experience with EDH?

What is your budget?

The goal is to keep everyone down on creatures with sacrificing. I try to make enough tokens to sacrifice with so that it doesn't really hinder me. If need be though regular creatures are sacrificed, I am working on using the power of sedris to bring things back at a rather cheap cost and keep them with Sundial of the Infinite . Which I haven't had the chance to buy yet. budget wise, Not looking to hurt my wallet to badly.

And to add more lands, what should I take out? I have a Drowned Catacomb to put in. I always struggle pulling cards out to replace them.

Smokestack would be brutal in here.