Yeah, Qi Qi's heals scale with her attack as well. I gave her the sword from the Battle Pass, and not only does she do respectable damage, but she's practically immortal...so long as she has a nearby enemy to whack, anyway.
That's one of the things that would keep me from using Jean as my only healer. I like having the ability to heal on demand, unconditionally. Well, unconditionally outside of CDs, of course.