Attack Order is correct: Hit All -> Hit Random -> Single

Team Setup should synergize if possible, such as stacking Attack or Skill Activation buffs, or Defense buffs with counter-attackers.

By the way, Wutan, the team in your signature... Alpinia should be before FP due to her skill healing herself while FP is just raw damage. That change buffs Alpinia's survivability due to getting more chances to proc self-heal (probably not much more given 3 AOE rainbows before them, but hey)