+Spd/-Atk Brave Roy?

The new power banner blessed me with my first Brave Roy, so i’m pretty excited!

But looking at his IVs I’m a tiny bit conflicted… +Spd is fantastic but will the -Atk hurt him significantly? Just wanted some reassurance since I’m building him anyways.

Before bis refine, yes. Blazing Durandal grants Heavy Blade; so more ATK is better.

BUT. After refining his Blazing Durandal, Heavy Blade is replaced by Special Fighter, so his ATK becomes irrelevant to the effect.
Plus, if you pull another Roy, that -ATK goes away and you have a kickass +SPD B!Roy.