I'm trash at farming jewels

[Abuze]

You're doing it wrong.
First off you shouldn't be farming in elite shuyal anymore, mauso is better for mages or elite mauso, you need the witches to debuff your damage and heal mobs.
Hex staff got nerfed bad and isn't good for jewel farming or anything at all, best way is to get to the lowest possible damage you can possibly get.
After witches debuff you, you start getting all mobs frozen and start using any skills that apply heavy DoT on mobs (charging fireball is a necessity since this applies the burn).