Fatestitcher + kiora's follower + mesmeric orb + laboratory maniac = mill yourself out ftw... 4 card combo shouldn't really be frowned upon unless you tutor for the pieces. You will probably need a way to reanimate the lab maniac too... so 5 cards?
I like Grim Haruspex in any deck I make that doesn't plan on keeping creatures around for long. Bone Shredder is also very good since it would be very easily recurrable with Meren.
The top decks currently have no use for the bfz block outside of gideon, ulamog, drana, and the lands. That's basically how it will be until the next set comes out.
I would like to suggest Death Cloud as a potential win card. Even in 1v1 if you can sac x=5-6 lands and creatures and your opponent does the same, you've got a commander close to lethal damage range. And it is flying to boot. It only gets better with more opponents, breaking the symmetry is fun!
I'm still buying some, because it is more fun than lottery tickets.