- Has jenny ever frozen someone mentally?
2. Goku's a saiyan, and their physiology is different from a human's, theres no reason to think he's brain works the same as a humans
Does this answer your first question(keep in mind this was a warning against a teammate)? As for question two, unless it has been outright stated that Goku's brain is not controlled by electric impulses it should be safe to assume that his brain does use electric impulses. Also Jenny killed "god" using this technique who was a giant flying space blob, so yeah(if you want I can post the scan of Jenny killing "god"). So not only can Jenny shut down one's brain, she can kill you from the inside.
Weather Wizard has fought a weather manipulator and negated her powers and even killed her with a lightning attack, so even if my barrage of lightning and wind attacks makes Ssauke's and Itachi's attacks stronger it won't do anything to WW.
I have a question a can they survive, say tornado in their stomach?
If not, then good luck powering a fire attack when your body is ripped from the inside. Also Misaka is like a stronger version of Electro + Magneto. She can control any type of metal including the metal particles within the earth.
So what have we learned? Well Jenny can kill by using your brain, Weather Wizard can kill you from inside your body, and Misaka can use the Earth us to attack.