Is Firefly's Light Cone a Must-Have in Honkai Star Rail 3.8?

Yo, Firefly's back in the game with her fly Light Cone, Whereabouts Should Dreams Rest, droppin' in Honkai Star Rail 3.8. If you already got Firefly, you better snag that Cone to boost her damage, g. But if you ain't got her, just chill and scope out other targets. This Cone's all about that Break action, makin' foes feel the pain, ya dig?