I played a pestilence deck in extended for a while. I actually won a few tournaments with it!
I don't have any record of what was exactly in the deck, but I know I used
Vindicate and
Death Grasp. I also used
Obsidian Acolyte to combo with
Crypt Rats. I also played
Lashknife Barrier for a while but eventually cut because of it's casting cost and the fact it didn't do anything for the pro-black creatures.
Although pestilence is a fun deck I really don't think it has a place in type 1.