Posts from RTF is a global modification that replaces all towns in the game. Auto-translated

Or maybe create a general Heroes of Might and Magic group on Discord, not just a dead one, but a lively one (with an admin and editors who are often there)?

Instead of creating new groups, you could ask someone to grant you admin (moderator) rights to an existing one. If there are no objections, of course, but I doubt it...

https://yadi.sk/d/7J71bHK2njowi
Update
RCF_v0.1.2
1) Added hero skins for the Dwarves (Rendan, Kella, Hrodgar)
2) Added shields to guards and pikemen
3) The unupgraded Faceless One is now brown
4) Changed the effect of casting Mind Control (seduction)
5) Changed the models and descriptions of the Dark Dwarf dwellings
6) Changed the stats of the Dark Dwarf creatures
7) Changed the territories (the native lands of the Dwarves are now lava, the native lands of the Elementals are now desert)
8) The arena for the siege of the Elemental city will be the old one (on grass)
9) Fixed all texts related to Troglodytes
10) Rickgard (Troglodyte specialist) now has a new icon
11) Stone Giants are now called "Giants"
12) Swapped the creatures of the Dark Dwarves and Elementals (only on the map)
13) Changed the guards of the Dark Dwarf and Elemental dwellings
14) Changed the undead raising table

What about the Battle March skill and Onyx Elementals?

Something went wrong with the heroes; the Dark Elves have a hero from the mages, and the Conflux has a hero from the demons.

Well, um... ahem... how to put it...
Here's the thing...
Maybe you just haven't finished working on it yet, or maybe I messed something up, but in general...
The units haven't been changed at all...
Instead of Mountain Orcs, there are just regular Gnomes...
And Sanctuary and Lizardmen have the same castle, which doesn't have a building animation...
Something went wrong with the heroes; the Dark Gnomes have a hero from the Mages, and the Elementalists have a hero from the Demons, and it even has the Demons' passive ability, which means it won't affect the gameplay in any way...
And as for the Chimera Mages, well, this is just my personal opinion, but the castle... okay, even if you leave the texture as it is and put up with it, at least change the background in build mode, because it looks like a "diamond or crystal" castle, but the background is a cave...

Something went wrong with the heroes; the Dark Elves have a mage hero, and the Conflux has a hero from the Demons faction, complete with the Demons' passive ability, which means it won't affect the gameplay in any way...

This is a special, scripted map. If you play on standard maps, everything will be fine. I will probably release a special version of the mod soon where all this will be fixed, but I will have to sacrifice territories and the "beauty of the castle," but at least there won't be this kind of issue with the heroes.

By the way, I forgot to ask: when you're working on the mod for the Naga town, please fix the bug that causes the icons for creatures and buildings to become blurry when the image quality is set below high.

By the way, I forgot to ask that when you're working on the mod for the Naga city, please remove the bug that causes the icons of creatures and buildings to blur when the image quality is set below high.

This is related to how these icons were saved. They were saved in the same way as creature textures, with Mip Maps being generated. Simply saving these icons without generating Mip Maps will fix the issue.

Added 3 minutes later
I decided to finish the elementals. I'm currently working on a puzzle map and a demon summoning spell. The old "Conflux" (elemental fusion) will now be a fortress – under guard and belonging to the player who captures it.