DISCLAIMER This is what I use. If you got something better, good for you! Any suggestions and questions are appreciated

Melee build for Wisp. Best used with my Dual Keres Prime Build: --->Link

Hold down Wrathful Advance, look down and release to refresh it's effect without consuming Combo Counter.
A bit of Range is mostly for Breach Surge.

Remember to double tap Wil-O-Wisp (2) to cleanse status and to become invulnerable to damage while shredding enemies down.

If you don't have/want to use [Adaptation], use [Boreal's Hatred] for a bit of Ability Efficiency