They're supposed to be stronger than an average creature to compensate for their lack of armor and weapons but not enough that 4 workers can tear through a somewhat well equipped and trained squad. Maybe there were some soldiers among them? Those are meant to be tough if you don't have decent armor.

@Ya Boi Sheev are the worker thieves supposed to be terrifying? 3-4 of them just tore their way through my front door squad

they do be anting doe

It's not based on anything in particular. I just started experimenting with the idea of creating gigantic mutant ants as enemies, and then figured out that I could make them into a civilization and have them siege the player constantly.

was this based on the old Hivemind Wasp civilization from Ye'Ol Masterwork?

After too many hours trying to replicate JonasIV's bug I haven't been able to do it. In my game the ambushes work fine and they don't die until I kill them. I'm going to assume your issue is the goblins killing them as soon as they spawn or some bizarre dwarf fortress wizardry that's not really my mod's fault.

If it happens to someone else please give me more details so I can try to replicate it and fix it again.

the hive horrors in my game instantly die the moment they enter the map, well the sieges do atleast, hive horror thieves work just fine, but when its time for a siege, they enter with the goblins and instantly drop dead on the ground

rimworld be like

Ok, so I checked and only the two big castes are intelligent (shame on me for not remembering), the workers and soldiers are basically animals, it doesn't cause issues cause they can't have any position, but maybe there's some shenanigans I never noticed if they join another civ (shouldn't happen often). I've actually gotten the dwarves to butcher them, so there's a reward for weathering the constant invasions. Guess I never looked at the food while testing them.

Now that I have the idea I think I'll experiment a little with giving them some reward other than meat.

They can't be butchered or used for anything because they're sentient, otherwise they couldn't work as a civilization. If you play as a modded civ that's accepts cannibalism you could maybe turn them into an easy food source though.

Butcherable ? Tanner skin ? This creatures have no items to loot so atleast it should be butcherable so that fight them will give player some thing back .

Sounds fun to have installed for whenever I create a new world, especially if I forgot. :-)

Do their bodies produce bone, shell or anything of value?

Serve the Hive.....
I control the groove.
Serve the Hive.....
I control the groove.
Serve the Hive.....
I control the way you move. ............................
How ya like my groove, Daggoth?"

This looks fun :D