Her 4 does WAY more damage than it seems, I managed to kill the kuva basic enemies at lvl 130 with one cast without applying debuffs nor activating the aura.}

Kinda same for her 3, against normal enemies [Yareli] just becomes a blender.

Use secondary weapons with her passive to defeat strong enemies.

Finally, the arcanes can be literally anything you want. I'd reccomend energize and some secondary related arcane, such as Arcane Velocity or similar