No Discord, sorry. Personally, I prefer it over a classic forum. But it’s really bad for support/troubleshooting, you lose track of issues too easily.
Anyway, you gave me a reason to finally purchase Dark Sun on GoG. Things don’t get less confusing here, because it’s working for me witbout any tweaks. Add new profile, select dsun.exe as main program, save profile, launch game. I didn’t change a single setting, and the game is running fine.
If you’ll share your profile here, I can take a look, and try to find out what’s wrong.