@TEKWRX I'm a bit late to the party but I heard you were thinking about building Cherche....
I have a flier emblem team with F!Morgan, Halloween Nowi, New Year's Azura, and Cherche, and oh boyyyy. Cherche built right can really wreak some havoc. The build I have for her is:
Weapon- +prf Cherche's Axe (If you can't refine weapons yet don't worry about +prf)
Support- pivot (but honestly you can run anything here it doesn't matter)
Special- glimmer
A- death blow 3
B- drag back
C- goad fliers, however for your team I would recommend using something like a tactic or guidance but guidance is harder to get fodder for
S- quickened pulse
It's not a terribly expensive build and it's quite useful. Of course anyone is willing to add or critique it but I'd thought I'd add my two cents