I liked the ability of Gisa and Geralf letting me cast zombies from my graveyard rather than exiling them. I know it's only at my upkeep, but pairing that with Havengul Lich and Rooftop Storm makes a good combo. I also like the Dimir influence and find it cool to mill my opponents using zombies, but just not quite sure how to implement it.
More for competitive fun rather than cutthroat. There is a lot of Blue Zombies that Mill my own deck like Laboratory Brute that I was hoping to work around as well. But I can't seem to grasp a good way of playing off that.