Talk:FGO 2016 Summer Event Re-Run/@comment-27904100-20170716081405/@comment-1625009-20170716093902

all Servant-classes have a "base Damage Multiplier" which is used on the basic ATK-value

Shielder, Sabers, Rider, Moon Cancer, Alter Ego: 1

Archer: 0.95

Lancers: 1.05

Caster, Assassin: 0.9

Berserker, Ruler, Avenger: 1.1

So it would give the most benefits to max out the ATK of Berserker, Avenger or Rulers, followed by Lancers. From you post I'd say Edmont Dante and Yorimitsu are the best suited for ATK-Fous, while HP-Fou are fine for all classes