I don't really think Blood Artist is better than any of those, except potentially Graverobber, where I think it's close. I think Graverobber has a higher upside, but lower average performance. Of course a cut could come from somewhere else. I would consider cutting Sarcomancy for Blood Artist. Both are cards that help aggro, the damage output is probably comparable, and the downside to Sarcomancy can hurt when racing other aggro decks or if you want to play other life-payment cards. Blood Artist on the other hand can help to off-set life loss from Confidant or Phyrexian Arena.
While that list is fine, I'd cut graverobber for him. His average case is better. He is no slouch for a 0 power guy, often doing 3-5 life drain. Nobody wants to waste removal on him, but it's almost always the right play, as a 2/2 can be blocked to stop bleeding, but he is not dealt with that easily. I'm not saying he's awesome but honestly he is a work horse in black aggro decks.
While that list is fine, I'd cut graverobber for him. His average case is better. He is no slouch for a 0 power guy, often doing 3-5 life drain. Nobody wants to waste removal on him, but it's almost always the right play, as a 2/2 can be blocked to stop bleeding, but he is not dealt with that easily. I'm not saying he's awesome but honestly he is a work horse in black aggro decks.
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