+def/-spd Lyn galeforce fodder?

depends on who you have and what skills you have available. it synergizes well with units who have high attack + brave weapons or fast units with slaying weapons. Having cooldown reduction, the ability to consistently double and galeforce is really strong.

-Spd doesnt even matter on her anymore with the Sol Katti refinement, just give her Ardent Sacrifice and Wrath and enjoy huge nuking potential with moonbow