User blog comment:Linathan/Unit Spotlight: Vicious Twin-Edge Logan/@comment-26336535-20160426205334/@comment-26140304-20160427005537

As far as the damage tests go with Atk and BB Atk buffs go, they seem to be synonymous with each other. Also, don't forget that it's not 500% in the BB mod spot. It's 600% since the base 100% modifier is taken into consideration as well, similar to base Atk.