Why so much of the Dead Man's Skull ingredient and so little truly exotic, obscene, or otherwise heinous little scraps? Maybe a ground up nipple, testicle, sphincter, stomach lining, bellybutton, kneecap, pinky toe, tailbone, various assorted internal organs, or fresh-ish nose and shoulder cartridge would do the trick? Or for a very powerful remedy, derive a hybrid combo. These might make even more effective a witchey brew than the skull bone and moss grindings.

It seems odd and a little repetitive, like spraying windex on every ailment. Where's the creativity? Not everything is a nail.

The Peanut Butter Solution was really on to something.

https://imdb.com/title/tt0089789/

On second thought, how remarkable is it that humanity has survived this long and made it to this point in the time game? If I were an alien observing these activities from a safe distance (and somehow also ignorant of toolmaking spieces evolutionary typicalities), I would bet against.