Using buff and debuff character making these two (Iori and Sassy girl) characters increasing the damage output significantly and surprise this one is better formation than the previous one
Character that gives buff (Kotama)
EXSkill : Increase all allies by 24.9% within circle
Normal : Every 30s, deal damage by 237% and reduced enemy Attack by 18.9% for 20s
Passive : Increase her recovery cost by 14%
Subskill : Increase all allies Attack power by 9.1%
Character that gives debuff (Akane)
EXSkill : Deals 547% damage and reduced enemy defence by 29% for 30s
Normal : Every 40s deals 396% damage
Passive : Increase MS by 14%
Subskill : When attacking, 10% chance to reduce the enemy's evasion by 6.7 for 30s