I've been on one Vent and it hasn't negatively impacted me, there are a few burn players where I am so the lifegain helps every once in a while. Mutavault is by far the more important man-land, they're colorless, come in untapped and have helped me close out a large number of games.
I play primarily against UW/x control, Hogaak/Dredge and variations on R/x burn. There are two Phoenix decks and a Mardu list as well. I've gone 4-0 in events the past three nights, so I've been very happy with the deck. It feels very strong right now.
Also: I think Eternal Scourge is nuts. Absolutely nuts. Seems like a must play in a meta where you play against removal heavy decks.
Hey, I like your list a lot. Went 4-0 at my LGS with this one, fairly similar with a few minor changes. The sideboard was a mishmash of cards I threw together very quickly, I'm going to refine it later.
Also: I think Eternal Scourge is nuts. Absolutely nuts. Seems like a must play in a meta where you play against removal heavy decks.
1 Collective Brutality
4 Concealed Courtyard
1 Dismember
4 Eldrazi Temple
4 Eternal Scourge
2 Fatal Push
1 Godless Shrine
3 Inquisition of Kozilek
1 Kalitas, Traitor of Ghet
1 Marsh Flats
2 Mutavault
4 Path to Exile
2 Plains
3 Reality Smasher
4 Relic of Progenitus
1 Shambling Vent
2 Silent Clearing
1 Surgical Extraction
1 Swamp
4 Thought-Knot Seer
1 Thoughtseize
4 Tidehollow Sculler
1 Vault of the Archangel
4 Wasteland Strangler
1 Kambal, Consul of Allocation
2 Kaya's Guile
1 Phyrexian Revoker
2 Plague Engineer
2 Ratchet Bomb
2 Rest in Peace
2 Stony Silence
1 Surgical Extraction
1 Sword of Truth and Justice
1 Thoughtseize