Urchins is meh and slow
Flesh Carver might be the best black 3 now
Grim Haruspex has been solid but not amazing
Strike Leader I like
Ophiomancer still makes me feel bad
Rager is sooooooooo bad
Necromancer is awesome if he works (and he should) in aggro decks with random humans.
Here's a similar comparison:
Fireblast is like the worst feeling in magic: all it does is cheat people out of playing games. Either it's 0 mana 4 damage that your opponent can't play around and they lose way before they should, or you fireblast an
Obstinate Baloth and lose 10 turns later. Never run this card!
Gush never really felt fun to me either, but at least it doesn't actively make me want to quit magic
vs.
Cuz I forgot if we did this yet or not.
Distortion Strike for Prowess, Dodge for Self Mill. I never got mill to work, and distortion strike's small power bonus/mana efficiency make it a little more appealing in general, so if you just want a stallbreaker pick that one.
I think self mill in general works better if the power level is lower (since you have more time to grind things out)