Aryan Magic seems to improve power levels faster than Jedi and Sith arts do.
As Mother Talzin demonstrated, she had ways to torture Count Dooku with a Voodoo doll. Talzin was less powerful than Elder Mothers, it was indicated one could resurrect the dead. One Elder Dathomirian was so strong in the force that, despite her species' natural lifespan, she lived 300 years of the powers of Aryan Magic. Gethzerion was the most powerful of them all, she straight dropped 100 Stormtroopers like that.
She may do to Palpatine what Talzin did to Dooku.
__________________ "Compounding these trickster aspects, the Joker ethos is verbally explicated as such by his psychiatrist, who describes his madness as "super-sanity." Where "sanity" previously suggested acquiescence with cultural codes, the addition of "super" implies that this common "sanity" has been replaced by a superior form, in which perception and processing are completely ungoverned and unconstrained"
Didn't Gethzerion outright fold Luke like a piece of paper and almost killed him?
Good match. I'd say Sidious takes this in outright combat. But Gethzerion could preempt him or kill him with some kind of ritual power in the proper circumstances.