Preventing Rubicante's Inferno
The Elemental Archfiend of Fire, Rubicante, has a powerful attack called ×Inferno, which will damage the party as well as heal himself. He only uses this attack when his cloak is open. While his cloak is open, use Steal with Edge. This will force Rubicante to close his cloak again instantly and prevent him from using his most potent attack.