I have been summoned
I'm using this one:
https://steamcommunity.com/sharedfiles/filedetails/?id=1601393865
It is as simple as it sounds, 6-players difficulty, for me it's a good middle ground, challenging enough to not fall asleep (at least late epic/legend), makes farming actually reasonable, but leaves space for making weird/for fun characters. I wouldn't make a challenge out of it though, it does seem easier then xmax (which i haven't played much), or at least add some rules to it. Then again, I always make accomplished heroes, and most of my toons have been leveled with a friend, so can't confirm how hard it would be from lvl 1/ no legacy.
The mod you linked seems to have some issues with ragnarok, not sure, but the visual glitches themselves kinda threw me off:
(https://i.imgur.com/5kV3FXV.jpg)