Suicide Black in Vintage.

This is going to be my first time playing vintage. When i last played it we called it T1. It is a mox tourney, and i thought it would be fun to play. I have most of the cards(other then the power) for a suicide black tendrils/will strategy. I just needed some advice on card choices, since i know nothing about vintage, but i figure no one in my area knows anything so...

Dark Ritual 4
Cabal Ritual 4
Duress 4
Thoughtsieze 3
Cabal Therapy 2
Dark Confidant 4
Tendrils of Agony 2
Grim tutor 2
Demonic Consoltation 1
time twister 1
night whispers 1
Vampiric Tutor 1
Demonic Tutor 1
Imperical Tutor 1
Necropotence 1
mystical tutor 1
time walk 1
ancestrial recall 1
ponder 1
brainstorm 1
Yawgmoth's Will 1
Sensies Diving Top 2
Echoing Truth 1
Lotus Petal 1
Black Lotus 1
Mox Jet 1
Mox Saphire 1
Polluted Delta 4
Bloodstained Mire 3
Swamp 4
Underground Sea 3
Library of Alexandria 1

Sb.
Leyline of the void 4
Rebuild 3
Massacer 2
Diabolic Edict 2
Bayou 1
Xania Swarm 3

Right now i have been trying to keep the stradegy cheap(in terms of mana cost) and have not added Minds Desire or Yawgmoths Bargian. should I? should i cut timetwister, as its uses are limited? Do i need an alternate win condition? I was thinking i could add a couple of tarmogoyfs and regrowth with green. Should i try to be more disruptive with Wastelands and Strip mines? I figure Sensies Diving top + Dark confidant can be a alternate win path. Is 9 "duresses" enough, too much or not enough? SB needs tweaking too i am sure.

Could i also consider modifying the deck to included Ad Nassea?