As others have commented, depending on the purpose of this deck it is a very good start to something fast and fun. If it were me, and I was going to play tournaments with this, I would add swap out these: Blight, Dash Hopes, Child of night. For some Mono black staples such as: Dark Ritual, thoughtseize, maybe sign in blood, fetchlands, wastelands, duress or hymn to tourach, hexmage, poweder keg / ratchet bomb... I like the suggestion of bloodghast as well. If your going for the LD theme, and playing casual, definatly stripmines, Meh, just my two sense. I have a similar deck, kudo's on the sinkholes :-)
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Not sure if I am reading them right, and I am no rules expert. But I just wanted to point out that jaces erasure and memory erosion will not trigger the loss of life from liliana's caress. The difference is "discard" and "put".