All Beliefs are Welcome Here!
Instead of hexing, I would focus the energy on removing someone from your life rather than harming and hurting.
Hexing doesn't really accomplish anything - energy put into there could be put into making your own life better. Would you rather get 10,000 USD or have your enemy lose 10,000 USD?
Make it so that the person simply does not interact with you anymore.
If you insist on harming the other person do it in a way that leaves as little of a link to you as possible in-case it back-fires. I don't see what harming another person accomplishes in almost all cases but sometimes it's absolutely necessary, such as in self-defense, and only for the motive of self-defence. I have not gotten revenge on people before.
Living well is the best revenge.
Why hex someone when living well is the best revenge?