Sanguine Bond & Zuran Orb Green Black Deck

For awhile now my primary deck in casual has revolved around winning via Sanguine Bond & Zuran Orb. Esssentially the decks goal is to get Zuran Orb, Sanguine Bond, & ten lands out as quick as possible in order to sacrifice the ten lands via Zuran Orb gain 20 life and thus deal 20 damage to the opponent via Sanguine Bond. In solo mode on MWS I have got my win condition as early as turn four, in real games turn five, but usually its more like turn six or seven.

I am just looking for any criticism, suggestions, or ideas that can help me improve this deck.
Thanks

Artifacts: 4
4 Zuran Orb

Enchantments: 7
4 Sanguine Bond
3 Khlani Heart Expedition

Instants: 3
3 Putrefy

Lands: 22
4 Bayou
4 Overgrown Tomb
2 Verdant Catacombs
6 Forest
6 Swamp

Sorcerys: 24
4 Skyshroud Claim
4 Maelstrom Pulse
4 Beseech the Queen
2 Natures Lore
2 Three Visits
2 Damnation
4 Search for Tomorrow
2 Kodama's Reach

Some cards I have had in the deck in the past include:
Diabolic Edict
Diabolic Tutor
Land Grant
Rend Flesh