Thread:Linathan/@comment-27653366-20160423013557/@comment-26140304-20160423023006

Atk Down debuffs actually don't have anything to do with mitigation. It's simply an additive reduction in the enemy's Atk stat, similar to how buffs work. For example, an enemy with a 25% Atk buff and Haile's -50% Atk Down debuff will net a -25% Atk buff. It's still a very useful debuff if your squad heavily lacks tanking damage from enemies, especially in raids.

As for your squad, I wouldn't recommend switching Selena out for Elza due to her clashing with Eze. Selena is absolutely replaceable with any other spark blanket that's viable, such as Reud or Zelnite (once his 7* comes out). Mikael and Magress are switchable units depending on the content you're tackling.