Hello:
Just a heads up on this spell.
I just completed this spell for my necro lvl 34. i started making some of the combineds that was crafted by players and did it really easy. skill up to about lvl 20 trying research, then after learning the recipe for Pristine Supple Hide tryed getting the Pristine Supple Hind failed the frist 5 times then pop got it. getting the skinning knift back due to return of failed item now after 5 failed trys, final got the pristine supple hide next 1 was a failed try and then got 2 more after that. so with that i have my lvl 34 spell Focus Mass Elementary Spellcasters essence.