The way I rewrote it would leave out Razordons. But so what? That’s the “charm” of a resources system.
It'd be fine if you make up equivalents for every source of weaponry. Then it'd even add some charm as different armies would care about different resources. However if you don't do that it'l inevitably be rather unbalanced especially as we're making this up as additional rules for an already existing game. It'd be fine if the armies were roughly equal in what could and couldn't make use of the blacksmith, but seeing as you have stuff like the SCE glad completly in steel versus completly naked and unarmed armies like fleshcourts it gets very unblanaced very quickly.
I thought fleshcourt was all undead waving old rusty swords around???

I haven’t been paying attention, what are they?
Most of em are unarmed they just have claws. Occasionally they'l be waving a big bone around as if it were a sword.
As for nurgle take the following
After each battle the battlefield is defiled with corpses, magic and all sorts of other carnage. Such a vertile land naturally attracts the grandfather's plagues. Roll a D6. On a 7+ nurgle manifests and needs to be chased away. Add 1 to the dice-roll for each battle that has been fought in this territory since the last time the territory was cleansed. While nurgle infects a territory you cannot benefit from the resources present in this territory. Chasing away the nurgle infections requires you to go and fight the grandfather's forces.
Additionally add the following in between fight action:
- Cleansing the battlefields: the player attempts to clean out the various battlefields in his territory to prevent deseases from spreading as well as to scavange whatever they might find among the corpses. Assign 1 unit in your army to fullfill this task. This unit needs to contain at least 10 models otherwise it is too small to get the task done.
Possible results roll a D6:
- 1: The battlefields where already riddled with desease, and even the occasional follower of nurgle. Your unit has fallen ill and must recover. It cannot participate in the next battle. Nurgle infects the territory.
- 2-3: The battlefields have been cleansed.
- 4-5: The battlefields have been cleansed and your soldiers scavanged a good amount of useable material. Gain 1 resource of your choice out of X choices (ore, leather, meat, pick some sensible ones

)
- 6: The battlefields have been cleansed and your soldiers have found a magic artifact. It gains a permanent bonus of your choice out of X choices. (+1 to hit, +1 to wound, etc.).