I have noticed in my playtesting that Griselbrand feels more like a win more card, too. Usually running 2 Nightmares means that I can fetch a big Nightmare with Rune Scarred Demon and that is good enough so Ive found 1 open slot in my deck and I'll have to look through my options there.
The variety of removal there seems pretty random. I'd do -3 Flesh for Dust, +3 Tribute to Hunger
I'd also put Undying Evil in the deck but then thats rebuilding it from the ground up almost.
Do you find yourself aggressively mulliganing if you go first for a Mind Rot?
I would never ever remove Flesh to Dust for a Tribute - you can't target opponent's valuable creatures with a Tribute so he would always sac something replaceable or cheap. Flesh to Dust killed A LOT of late game fatties for me and usually it's the answer I'm fetching with Rune-Scarred. Don't know why would you suggest removing it.
Same thoughts on Griselbeand here though. When I have 8 mana available he'd be an overkill. Now, if only we had some kind of ramp like Heartless Summoning...
Ok.. finally got around to posting my mono black. I put a lot or time into this one, won lots of matches with it (20+ ranked and unranked). It's kind of like LoD last year.. kill all the things (especially major 2/2 combo pieces like Vizkopa Guild Mage, Mentor of the Meek, Selesnya Mages, Jade Mages, Talrand, Guttersnipe, that obnoxious T1 Satyr Hoplite, etc.) make them discard their good cards, remove their great cards with your big kill spells/deathtouch abilities, play big nasty flyers for the win. It really locks the enemy down.
That's almost a copy of what I'm running atm
Diffirence is in 3-4 cards, I guess. Seems like a pretty solid list to me. Only thing to be cautious about is Spider Spawning/tokens decks but I'm still not sure whether or not including Suffer the Past to counter them worth it.