I wanna live on the edge, always~♪

Not really, but... Isn't 25 too old???? The combo of sustained Messer and burning Luce is too strong. It's probably best to take down the Iron Dice when they put up a shield on the 2nd and final turns. You can ignore the Greatsword of Execution since it just deals damage. However, it has insane firepower, so rely on Cherish. If you don't have Cherish, bring a healer.