So this looks rather simple- but I think I found a way to get around the cloth physics going crazy by using the textures to turn certain parts of a mesh invisible. You may see some artifacts from the invisible part of the original mesh of the robe. The "skirt" is actually the visible part of one of the wizard robes and the top part of the mesh is made invisible with the base texture. The top part of the robe is it's own mesh that I edited. Let me know if it acts weird for you.

The stats aren't very interesting. I highly suggest learning how to edit item stats- it's super easy and doesn't really require messing with mods.

Hack Your Equipment and Basket Full of Equipment. SFW  each have guides on editing armor stats.

Trying to edit a robe with cloth physics is what led me to make the previous armor mods lol. This is actually the first thing I ever wanted to make.

And this is dyable. The outcomes are ok, I guess?

Anyway, this works on male humans, elves, half-elves, drow- body type 2.