Some people like to run SB/WB as it has synergy with the Binding Blade weapon skill, DC is another option as it takes advantage of his mediocre Def and Res. CD and Fury are another great options, but on a budget.
I have one guide/build on my profile and its of Roy. If you click on my name and click on my Roy you'll be able to get to it. I go in depth on why you should take each skill and what your best options are for each skill (if you want to know more)
Pokemon GO
Fire Emblem Heroes
Fate Grand Order
Dragonball Legends
Dragalia Lost
IV Calc
Heroes