Graveyard Keeper 2 zombies: red skulls, skills and factory work
A good zombie worker in Graveyard Keeper 2 is not simply a corpse with the original game's preferred skull total. Zombies have their own skill progression, and corruption, represented by red skulls, improves their skill potential. A body that looks undesirable under an old burial rule can therefore be valuable when you are preparing a worker.
The practical question is what you want that zombie to do. Repeated bench work, operating a factory machine and joining an armed squad are different jobs. Build the body and develop the skills around a purpose rather than treating every zombie as an interchangeable speed bonus.
Why red skulls deserve a second look
The first game's familiar advice often focuses on removing red skulls and preserving white ones for burial. The sequel gives corruption a different role in zombie development. More corruption creates better potential for skills; it is not a number to erase automatically from every body.
That distinction matters before you extract organs or use embalming. If the destination is a worker, judge a change against the worker you are trying to make. Do not apply an old injection sequence from memory merely because the same broad activities still exist. A recommendation for the original game's cemetery is not a recipe for a skilled sequel zombie.
The zombie panel is the place to compare the actual character, available skills and skulls together. A red-skull total on its own does not tell you which job is most useful for your next objective, and it should not be converted into the original game's fixed efficiency percentage.
Match automation to the part of the chain that is holding you up
Zombies can work at ordinary stations and operate semi-automatic machines in underground factories. Conveyor belts connect parts of that larger production setup. These systems are valuable because repeated processing can continue while you deal with other tasks, not because placing a machine automatically supplies its inputs.
Trace a product back to its input source and processing station. Watch which step runs out of supplies before assigning another worker. A worker waiting at an empty machine cannot solve a shortage upstream.
Consider a simple planning example: you need equipment for an upcoming battle, but production is waiting on processed materials. An extra final-stage machine will not fix a shortage upstream. Improve the part of the chain that feeds it, then judge whether another downstream station is still necessary. The particular recipe and quantities should come from the station you are using, not from a copied first-game spreadsheet.
Town development feeds the workforce
The Town restoration loop matters to workers as well as to money. A larger Town brings more bodies, and prosperous residents provide a route to more corrupt bodies. That makes restoration part of your long-term workforce preparation rather than a completely separate decoration project.
Corrupted organs and corruption-focused embalming also belong to that preparation. The important decision is the intended destination of the body. Preserve a promising worker candidate while you inspect the operation you are considering; do not make a permanent body change solely to satisfy an unrelated cemetery plan.
This also explains why there is no single sensible answer to “How many red skulls should every corpse have?” A worker's skill potential and a grave's contribution are separate jobs. Keep the graveyard's modules and burial planning separate from the worker decision.
Workers and troops share preparation, not identical priorities
Your undead also serve in combat. Weapons, armour and training matter when you prepare squads, while the battlefield itself adds towers and barricades. A good production plan therefore considers both what a zombie can make and what your next battle will consume.
Preparing a large army ties up bodies that could otherwise help the workshop. Compare the equipment needed for your next fight with the work another zombie could finish before then.
Enemy undead are part of the threat to the Town; that alone does not make them your available workforce. Plan around the zombies you can actually prepare and manage. The useful starting point is a named job, a suitable body and a production chain with somewhere for its output to go.