Any CE that gives her Arts up, NP up, and or starting charge is fine with her.
You can use her as a primary or secondary attacker, Tammy is obviously a good support for her, Hans works well if you want to gen stars, Mozart is good for 1 turn bursts, borrow a friend Waver until you get your own (if you want to of course), or just focus on getting Castoria.
I exclusively use her as a primary attacker so I can’t really help with the secondary stuff.
This CE:
Is coming (again) during the Summer re-run, it’s a good enough fit for her (and it’s good in general).
I don’t recall ever having an issue with her star absorb but you can probably plug up the issue with some star absorb Command Codes (try to stick to 1 or 2 at max).
Star Gen on the other hand is a bit of an issue (at times), Hans can usually plug that up along with some star gen CC’s (it feels like she only really needs about 5-10 more stars to be a lot more consistent).
Her NP gain isn’t the best, though it’s not at all bad, just decent, (and her battery helps) but with the right support it’s basically a non-issue.
I’ve never used her in a Quick team before, but if you want to use her in a general Crit team, as I said earlier, Hans, Mozart, 2030 CE, Star Gen CC, maybe Cas Gil/Lanling.
TLDR
She’s fine with Tammy, Waver, and Castoria as supports (the usual suspects).
As for CE’s go for anything with starting charge, Arts/NP damage up, etc. (the Summer Re-run Event CE is a good fit) Mark on a Smiling Face is a great choice, as is Black Grail of course.