Thassa, Deep-Dwelling is really good. I would cut Razaketh, the Foulblooded for it because he's just so expensive. Also maybe cut your really expensive cards like Myr Battlesphere and Sheoldred, Whispering One for cards like Ice-Fang Coatl and Wall of Blossoms

I have a very similar build myself. I will say one thing that I would add to your list would be Crystal Shard. Awesome for saving your dudes from removal and sets up recasting creatures for even more etb effects. Erratic Portal and Equilibrium have similar effects. Personally, I would add all three of those and maybe cut Blood Seeker, Lotus Cobra, and Meren of Clan Nel Toth (cuts are tricky in these lists - that's just my opinion obviously). Good luck and happy brewing!

Braingamer: Thanks for those suggestions! Thassa, Deep-Dwelling is pretty sweet, and I really need to get my hands on one. I do agree that Sheoldred, Whispering One and Myr Battlesphere are not needed in the deck (Sheoldred is really only in there for extra graveyard recursion; the Battlesphere, when bounced, produces a crap ton of tokens and decent direct damage); however, I must respectfully disagree with cutting Razaketh, the Foulblooded. While his cmc is high, I have a few ways to cheat him into play, plus my ramp seems to be mostly consistent enough to allow me to hard cast him if need be, and he has almost single-handedly won me multiple games by allowing me to dig for whatever answer I need when I need it, while also giving me graveyard fodder to recur for more etb triggers. He's also an 8/8 flying beater with trample, which is a nice added touch for offence or defense. I may be completely wrong, but I really -really- enjoy Razaketh in this deck.

wozislightning: Awesome suggestions as well. I would -REALLY- like to get my hands on a Cloudstone Curio for this deck, but it's out of my price range, at the moment. Your ideas are definitely more affordable, and will require more investigating. Thanks much!