@caden2690 is 20% the amount u need for his NA to be better than CA I use lost prayer with his set so I have 20%atk speed nd I play on mobile 90%of the time so NA is easier for me.
Lost Prayer gives Movement speed and not ATK Speed so you have only 10% ATK Speed. For NA, I prefer 20% speed minimum, though my Fav team includes Mika + Yunjin for 42% Speed!