Cherche B slot

I gave mine Wings of Mercy, mainly for Arena points, but it works pretty well since she can teleport to any ally low on HP and just demolish an enemy.

The prf doesn't change too much for her choices of B-skill. The only skill that I think has gained in value is renewal, because if she somehow takes damage (ex: quads some slow unit with flier buffs) she might potentially want to get her HP back up for panic ploying.

Hit and run is a great choice for Player-Phase Fliers!

Fliers can abuse their mobility to retreat over mountains/rivers/trees, etc. Hit and run allows Cherche to nuke a unit, then quickly retreat into a better position where she can be repositioned out of harm's way.

I use Chill Def 3, but since you have Veronica you probably don’t need the debuff. Hit and Run is a solid choice, especially if your other units are using Reposition so you can pull her out of harms way after attacking.