You have no idea. She's sitting on a Brave Bow+ and a Refreshing Bolt+ in her inventory as well as a slew of other skills like Death Blow, Vantage, and at least 4 different C skills.
yesterday we discussed the main idea of a Double Distant Def 3 build with skill and seal. Faye is like hard-abuser of this built. With QR2 she will wreck anything ranged that dares to attack her while taking no serious damage ^^