During the HIVE entrance exam, Jade placed 12th in overall performance for the first segment (9th chronologically), out of 43 students that passed (there were 60 to start). This is even MORE impressive because she was NOT using any of her powers, and was going on PURE INSTINCT!
She managed to come in the top 5 overall, and considering there were only 12 or so applicants left by then, that's nothing to sneeze at!
The Titans teaming up with Jade and Jinx to defeat Mumbo, culminating in Jade and Starfire beating the crap out of him.
During the Tournament of Villainesses, Jade comes in second, losing only to Raven (and that was only due to Jade trying to get Raven to surrender without overly harming her, allowing Raven to overdose her on shadow energy, though Raven was going a little easy on Jade as well).
"Yeah, because you stack the deck. And brag about beating up a girl who has already fought hard while you sit on the sidelines. I know real badasses, and you don't even come close to the list," Zhu Chan taunted.
"Enough of your impudence!" he commanded, firing a starbolt at her. She burst it with an optic blast.
"Sloppy. You may have a lot of power, but you didn't earn it. They may not have been smart, but at least they know their own power, idiot," Jade shook her head.
In an Offscreen Moment of Awesome, we have Jade taking down Machete to keep the Ax-Crazy lunatic from hurting Raven, after the heroine chose to stay and free them from the Master is both this and a CMOH.
Jade enters Brother Blood's dream, and finds him happily dreaming of killing all his students. Jade screws with him by having Dream!Gadjo survive and retaliate.
Tarakudo proves once again he's the smartest of the JCA villains; when Dream Walking Jade finds him messing around in her subconscious to bring her closer to his way of thinking, he goes along with her assumption that it's a dream and invokes Real Dreams Are Weirder in order to get her to leave.