I like it. I'd probably change the manabase slightly (cut the painlands, add thawing glaciers, reliquary tower, and a basic), and include a few more utility creatures. After all, your opponents can play some nasty stuff too, and with survival/genesis as obvious tutor targets, it'd nice to be able to dig up some silver bullet answers, especially ones with flash in response to something (stonecloaker and aven mindcensor come to mind, but more generic ones like indrik stomphowler or acidic slime fit the bill too). If your deck can easily tutor for a disenchant that costs less than angel of despair/woodfall primus, you can cut mortify/putrefy for better creature removal like swords to plowshares. Or just flat out cut them.
I'd try to find room for reya dawnbringer, and maybe a creature-based sac outlet too, so you can survival for it if you haven't been able to topdeck one or another tutor (carrion feeder maybe?)
I would try to cut a bunch of the instant/sorcery spells in favor of some more re-usable permanents. I like things like Condemn and Beacon of Unrest and Regrowth and Restock, but in EDH there are much better choices that can be used more than once, providing serious card advantage. Try looking at the EDH deck database for some ideas...there's at least a half dozen Teneb lists already.
1 Teneb, the Harvester
Lands 36
1 Barren Moor
1 Bayou
1 Bloodstained Mire
1 Brushland
1 Caves Koilos
1 Fetid Heath
1 Flooded Strand
3 Forest
1 Godless Shrine
1 Golgari Rot Farm
1 High Market
1 Llanowar Wastes
1 Orzhov Bascilla
1 Overgrown Tomb
1 Phyrexian Tower
3 Plains
1 Polluted Delta
1 Savannah
1 Scrubland
1 Secluded Steppe
1 Selesnya Sanctuary
1 Strip Mine
3 Swamp
1 Temple Garden
1 Tranquil Thicket
1 Twilight Mire
1 Volrath's Stronghold
1 Windswept Heath
1 Wooded Bastion
1 Wooded Foothills
1 Academy Rector
1 Akroma, Angel of Wrath
1 Angel of Despair
1 Avatar of Woe
1 Desolation Angel
1 Duplicant
1 Eternal Dragon
1 Eternal Witness
1 Genesis
1 Karmic Guide
1 Sakura-Tribe Elder
1 Solemn Simulacrum
1 Spiritmonger
1 Sundering Titan
1 Woodfall Primus
1 Yavimaya Elder
1 Yosei, the Morning Star
Spells 25
1 Austere Command
1 Beacon of Unrest
1 Condemn
1 Damnation
1 Death Grasp
1 Demonic Tutor
1 Eladamri's Call
1 Enlightened Tutor
1 Explosive Vegetation
1 Hallowed Burial
1 Kodama's Reach
1 Life from the Loam
1 Maelstrome Pulse
1 Mortify
1 Profane Command
1 Putrefy
1 Regrowth
1 Restock
1 Return to Dust
1 Rout
1 Skyshroud Claim
1 Tooth and Nail
1 Vampiric Tutor
1 Vindicate
1 Wrath of God
1 Yawgmoth's Will
1 Debtor's Knell
1 Greater Good
1 Mirari's Wake
1 Necropotence
1 Pernnicous Deed
1 Phyrexian Arena
1 Survival of the Fittest
Artifacts 10
1 Gilded Lotus
1 Journeyer's Kite
1 Lightning Greaves
1 Mind's Eye
1 Oblivion Stone
1 Pithing Needle
1 Sensei's Divining Top
1 Sol Ring
1 Sword of Fire and Ice
1 Sword of Light and Shadow
Planeswalkers 3
1 Elspeth, Knight Errant
1 Garruk Wildspeaker
1 Liliana Vess
I'd try to find room for reya dawnbringer, and maybe a creature-based sac outlet too, so you can survival for it if you haven't been able to topdeck one or another tutor (carrion feeder maybe?)
Yeva (88/92 foils)
Raff
Scarab
Rakdos
Wort ($50 budget, 94/97 foils)
Trostani