Forum:Help my WATER Sea Serpent deck :D?

I've been making a few decks lately. I've had a WATER deck forever, but I started refining it again so it's updated to include cards from the 5D's packs. Anyone have any suggestions on how to fix it?

I am planning on getting Brionac and Dewloren. I'm waiting for Structure Deck Marik to come out so I can easily get copies of Mirror Force and Metal Reflect Slime without draining my wallet.