Unfortunately, Kilphe have innate missile resistance while Lu'Cia is weak to magic...

This is a stupid comment

naah, just build a resistance team and a dedicated tank, lucia will just be fine

same logic goes to the kilphe team then, build a resistance team vs lucia and kilphe will be fine.

Kilphe can even take neutral wind damage if you give her ochu as her esper. Pair that with her already resisting missle atk, as well as adding more of that with a +Plat robe, and lucia will be nothing against kilphe.

Fenrir card isn't out yet, so for now there's no magic ressistance esper/card that can handle kilfe yet