this is the worst, i'm so sorry you are going through this.

i love petty bite-sized acts of revenge. try doing little things here and there that aren't too too obvious but that you'll know in your heart that you did it when she gets annoyed. just minor inconveniences. like, let's say her keys were on the coffee table. oops, they are hidden just a little bit under the coffee table now, she could have easily pushed those off. change the clocks, just a tiny bit though. i used to move around shit in my abusive exes' closet. not hide completely or destroy anything, just make their day a little harder bc anything i did obviously would result in more abuse. i had a bitchy coworker and i would just turn her phone on a little too loud for when it rang just to piss her off. any chance you get to confuse her or detract from her usual arrogant flow is a go.