I realized it's rare to naturally navigate into Zombies besides just starting with decent Black or Blue cards that also happen to be zombies, so I'm trying out Death-Priest as something more universally decent (good in BW, BR, and obviously BU) and the more exciting Shambler to improve the curve. It might need more than this, particularly in blue, but something to watch for.
I want more simple/charming cards that are still evocative, so I'm trying Yargle even though he has nothing to do with any strategy.
Reducing the amount of text walls by duplicating Hawk instead of Cleric. It does mean I need more enchantment removal instead, but I'll keep an eye out.