(Originally answered to comment that asked for Triple Mactusk in settings.)

I'm gonna tentatively say that I will try not to delve into biomes territory; there would probably need to be a lot of learning to be done to get there, and there already exists mods that complete this feature. I'm including some below for you, in case you're interested:

Force Biomes - this one allows you to pick and choose which biomes you like.
https://steamcommunity.com/sharedfiles/filedetails/?id=926178831

Triple MacTusk - this is exactly what you're looking for, and should be compatible with most if not all mods. If I incorporate triple mactusks into this mod, it'd likely have to include a lot of code (or ideas) from this mod too, so I don't want to step on too many toes just yet.
https://steamcommunity.com/sharedfiles/filedetails/?id=885426046

Megarandom World Generation - this one is if you wanna go all out and create a massive world of some form, outside the vanilla worldgen parameters. Well-maintained, tested to be compatible with some other ambitiously-large mods.
https://steamcommunity.com/sharedfiles/filedetails/?id=1073203411

Hope that helps! I'll include the links in the description too, in case someone else wants to use these biomes in worldgen.

Any chance to add mushroom rings (the large 15 mush rings that spawn in grassland clearings, and decideous clearing)?
They spawn in the same way as the insane pig (UNSURE), like this below.

---------
AddRoom("Clearing",
value = GROUND.FOREST,
countstaticlayouts={["MushroomRingLarge"]
-------------
AddRoom("DeciduousClearing", {
value = GROUND.DECIDUOUS,
countstaticlayouts={["MushroomRingLarge"]
---------

PS: But perhaps even custom tasks for different colors (mushrooms) instead of just a random chance to spawn 1 variety of color.
So like MushroomRingLargeRed, MushroomRingLargeBlue, MushroomRingLargeGreen.
This way we can spawn every large mushroom ring.

I doubt there is a way to add exact rooms like that (Clearing/DeciduousClearing)? Instead we have to pick the right tasks, however that will force the set piece to spawn a bit differently and also spawn on savanna and rock I think (for example), since tasks are mixed compared to rooms.

It works a little differently then the pig set piece it seems. It does not have its own "layout lua." instead its shared with a bunch others in -"scripts\map\layouts.lua"

Hey CheetoJesus, is it possible when TallFort setpieces are enabled that they spawn in the Rocky Biome rather than Mosaic? Meteors keep destroying my farm :c

Hey there! I can dig into it, I think the tallforts tend to spawn much more easily in the mosaic biome, but they're kinda useless when they spawn over there anyhow. I'm a slight bit busy currently but I'll come to this part definitely in the future. Cheers!

thank you! <3

With the recent WX rework, people are gonna want those ice and fire hound traps. So, maybe you could add configuration for specific traps like you did for some other setpieces.

You got it boss! One more possibly-last update until someone has another smallish quality of life suggestion. Any other things you might like that are easily achievable? I may consider them and push the changes together if I have time. (Alternately I could just push the ice and fire houndtrap change too.)

Hey! If you decide to update this mod again, would you mind also adding the wasp hive/grass tuft setpiece to the list of configurable fine-tuned adjustments? As a Wortox main this is something I absolutely love being near my base for easy souls. Thanks!

Ok sounds good, lil bit busy these next few days but I'll see about getting wasp hives and red/blue staff setpiece as configurable! Expect something in maybe a week or three, thanks for your suggestion!