Ideas of questionable quality

[Katzen]

The chaplain fights vampires, wraiths and wizards so the janitor should fight the blob.

...go on

I was actually writing up a post for this separate to this thread but I was struggling to make it come together.

The simplest starting point would be for the janitor to be highly resistant to blob abilities, in the same way the chaplain is basically immune to vampires. They don't get impeded by regular blob tiles (possibly just slowed movement?).

The problem I ran into is expanding this further without items. The chaplain has a gun, melee weapon (bible) and holy water and is fighting individual NPCs. You could add something extra to the mop or spray bottle but I don't think it would be better than what chemistry could do at the moment.

I was thinking about a bio hazard cleaning crate (janitor id locked) that contained a Fludd style backpack device with special chems (special as in useless outside blob to prevent abuse) that could give the janitor a set of abilities. No-one else can use it because you need Janitor training, a job perk like Chaplain training limiting who can draw Faith. You could almost make them an RTS style opponent building up their own fortress against the blob, Creeper World style.

Blob resistant barriers (basically Thick Membrane equivalent)
Anti blob floor coating (paints floor tile, slows spread)
Anti blob turrets
AOE combat attacks