2 Glow-Up Bloom to get large bodies like Dooming and Jack-o-Bolan out onto the field or to search LV 5 or higher zombies like Vampire Fräulein. 3 Shrank Solitaire to summon Uni- Zombie or Glow-Up Bloom from deck.
3 Mizuki which you can choose to play at 2 who summons zombies from grave. 2 Necroworld Banshee to ensure a Zombie World on the field.
3 Super Polymerization to deal with your opponent's board and for a form of interruption when you set it on turn 1. 1 Card Destruction to set up your grave and to get targets for Jack-o-Bolan and Ice Dragon's Prison.
Extra Deck isn't that important, so you can choose to play Pot of Extravagance if you want. 1 Chaos Ruler, the Chaotic Magical Dragon for the mill effect.
Ironically 1 Rampaging Smash tank Rhynosaber since it's synchro Nearly who can tag out into materials for a LV 7 synchros which would be Red-Eyes Zombie Nero Dragon which is a massive body, and it has a similar monster-stealing effect to Fräulein. Vampire Sucker for draw power and tribute summoning Dooming LULU.
Waiting for an actually good generic Zombie XYZ Monster Try to get Red eyes zombie Nero dragon out, and he will be your main damage dealer.