First time I'm saying this but it's better to get her signature weapon instead of her v1 as the weapon helps her personal dps and the team dps more than her v1.
The v1 isn't bad but the value of the weapon is just better, you should only consider getting her dupes if you plan to v6 her or just stop at v1 as she doesn't have any great breakpoints and she works very well at v0 already.
For budget options from least to most damage there is guerno, planeta and golden melody.