She is fine as she is. She should hit extremely hard when you consider her health. Yup she can one shot a lot of people not fully shielded. Well a lot can one shot her as well if she isn't fully shielded.
Take her dmg away wat does she have? Nothing. Is she countered, or added assist chance, then maybe. But as she is now? No. She should stay exactly like she is.
For the record I hate facing Rey. And yes I use Rey. I have a person on !y arena shard that has a gear 10 rey and she destroys my gear 9 Rey. But I still see her as being food where she is. It's just that she is built well while 90% of the other toons in game are not