Does the shaman skip is allowed in the any% category "No Major Glitches" ? I saw that the Wr doesn't use it so i'm asking ^^

What do you mean by shaman skip

If you mean Mound Skip (inventory dropping or otherwise maintaining control during the Vengeful Spirit pickup, and using that to leave the room before being teleported behind the gate), that is banned as it is invisible control.

You can read the full NMG ruleset here.

Thanks a lot for the reply and the answer ^^ !

There is another shaman skip, which involves getting interaction storage from the bench then warping to it through the bars once you have VS. It almost definitely counts as a major glitch but I figured I'd bring it up. It probably counts as an out of bounds glitch since you can use it to do that.

You're thinking of delayed interaction (aka delayed interaction storage, but half the community swears by dropping the "storage" part because it's inaccurate and also people confuse it with interaction storage too much) but yeah it is a major glitch, so you're not going to see any NMG runs doing it.