You can only use 1 "Zombie Necronize" effect per turn, and only once that turn.
Take a card like +2 mace
Baxia, which can send this to the Graveyard while securing the revival cost, can also recruit Sephira Siugo with its effect when sent to the Graveyard, so it is effectively a Rank 6 Xyz Monster as well
ZNR also had a warrior and equipment theme, so this seems to continue that idea and encourages a Voltron strategy (making one beefed-up creature with a bunch of auras/equipment)
I hope you guys can spice your business cards up with this tutorial, and if you are curious, I have this post that covers how I made my previous business cards
Onibimaru Soul Sweeper can help you deal with monsters with a high attack, moreover, if destroyed, it can return banished monsters to your deck