Roy's supports are good (Alen/Lance/Roy triangle), but if you're not assuming support grinding he can't even do that and without his support partners his bulk is a lot worse off.
Swords may be good but Roy's stats are not. He averages 12 str/14 spd/9 def at level 20. With those stats he won't be damaging much and will take strong hits back from stuff like wyverns and pegs/nomads.
Yes you could use a Wyrmslayer against wyverns but even with the triple might not having weapon triangle kinda hurts. When Binding Blade comes in he will kill everything but until then he just isn't great.
Nanna is pretty fine without the Paragon Scroll. It's up to you, but it's generally well used on Safie (makes getting A staves for Chapter 12 much looser) or some other growth unit like Mareeta (although she could just use Paragon Sword).
Path of Radiance is also easy and Awakening is very similar to Fates. PoR is expensive and needs some decent hardware to emulate though, but getting Awakening should be no trouble seeing as you can just get it off the eshop.
Hi, I've been lurking here without an account for a while and finally decided to make one. I've been an FE fan for a while, but I'm still pretty bad at it. Probably won't be very active for a while but I'll try.