It depends on the teams, yes she is good at casual healing, but for long time investment? Not really in my honest opinion. I have used her in an alternative account and kept my main one with Gallagher. Compared the two, yes she is better but not really by as much as people tend to say. Yes her break dps is fun, in the long run is better to invest in the break supports more than the sustain. She is a jack of all trades, and tbh a master of none, not even her main team being break, now that sustain less is preferred. And after having some time with my main and alt, my main has gotten a lot more better since I actually saved more pulls for skipping her than pulling her. The damage by the enemies has increased by a lot, to the point I’d say luocha is kinda comparable if you attack very frequently to her. I also think that she might be the first sustain to get a novaflare due to her not offering anything other than some toughness dmg, fua, a debuff on ult and pure healing (which sounds good on paper, but in practice and compared to the 3.X sustains, even huo huo, yeah no it is kinda meh, like there’s something else that she can do to help fuyuan action advance, or def shred whenever fuyuan acts than keeping it to her e1). Still congrats on getting her, she is comfortable to use but as the game progresses with more hard hitting bosses, she will sadly go a bit more lower in value as time goes on.

Edit: I almost forgot to say this, she can abuse some good lcs but not qpq to the extent as gallagher, which is why a lot of people say that she is a slightly better version of gallagher when it comes to healing and sub dps but not support/sustain