NY!Azura B skill

Gonna be adding her to a flier team, after messing around with Catria I've found a dancer is rather helpful, and I'm not sure what B skill to give to Azura.

Getting Flier Formation in her Seal slot, her B skill is open to WoM or a Chill skill as my main ideas, but I figured I would ask here and see what other people thought.

As for Azura combat wise, well gonna play her as more of a support, but may give her a more offensive weapon like Wo Gun, just to see how it feels on her, and Fury+Moonbow. If it matters, she is +Atk, -Def.