Brave Lyn IVs

So I have a neutral brave Lyn, and a -atk+spd one. Since both attack and speed are super important for her I would imagine either way is pretty good, though I figured it would be good to ask before going one way or another.

I know +speed should make her nearly impossible to double outside bowbreaker, plus increase her doubles against other common fast units in the arena, but in my experience -attack is going to hurt a lot against tankier units. Hopefully others could handle those, but still with how many she doubles already it seems like neutral would be better to avoid sacrificing that attack.