For having only M13 to deal with I think you did pretty alright. Although one thing, evolving wilds is almost useless here, just run swamps. and run 60 cards, it's always best.
If you only have m13 I don't know what all there is to say, you need more sets. Most of the stuff in m13 was really bad. The only thing it gave black was Mutilate
and a reprinted Vampire Nighthawk
alongside a few more situational cards like Knight of Infamy
Check out the MBC thread in the T2 deck forum.