I have an extra Legendary Claude, but I’m not sure who to give the Catch skill to (or even Spd/Def Rein, but I will consider that). Among the flying and cavalry units I have, I think they would prefer Swift Sparrow, Fury or an Impact or Solo skill and the conditions to meet the Catch skills aren’t as easy to control despite the stats in both phases.
Some examples of units I can currently think of are Caeda (Pegasus Flight build and the only +10), Eliwood, Brave Roy, Cordelia, Seteth, L’Arachel, Peri, Reginn, SoV Catria, and Erinys. Only Seteth and maybe Eliwood I’m thinking of merging, but as I said I think Eliwood is better off with SS3.