Summer Event Help

[Spyells]

Hi! I had a question about the summer event in KHUX. On the quest which is Day 7 - 1/3, the target is Dual Durandal. I'm not sure how to defeat this boss. It seems the numbers over his head corresponds to the amount of turns I have until he attacks. Dual and the other heartless attack before I finish my rotation and kill me each time. How do I finish this quest? Thank you.

 

[faemarch]

The red numbers above each enemy correspond to an attack counter--with each attack from a medal, it'll decrease by 1, unless the medal's special ability ignores attack counters or increases it. (Blue numbers correspond to a hit counter iirc.) When the number hits 0, the enemy will make an attack.
Medals that increase or ignore enemy counters--like the Incredibles medals, some of which you should have from the free pull--should help, but if you can't take down the Dual before its counter hits 0, try taking out the other enemies first.

 

[Spyells]

The red numbers above each enemy correspond to an attack counter--with each attack from a medal, it'll decrease by 1, unless the medal's special ability ignores attack counters or increases it. (Blue numbers correspond to a hit counter iirc.) When the number hits 0, the enemy will make an attack.
Medals that increase or ignore enemy counters--like the Incredibles medals, some of which you should have from the free pull--should help, but if you can't take down the Dual before its counter hits 0, try taking out the other enemies first.

Thank you. I'll keep this in mind. =)