DeRosa (Bravely Default boss)

Fiore DeRosa is a boss in Bravely Default. He if fought at Florem as an optional boss during Chapter 2's Sub-Scenarios.

Strategy
If the party have Summoner's Abate Lightning, they can reduce DeRosa's Thundara damage as he also often casts it. Edea will start the battle with Charmed status, simply having the weakest party member to whack her or use Esuna to heal it. DeRosa can use Captivating Cologne, despite the initial purposes, it also works on Tiz and Ringabel. His Revenge ability grants him 25% chance to gain 1 BP when receiving damage, so it's not something to be worry much. If the party had obtained the Light Curtain from the Land Turtle before, they should use it on DeRosa so that when he casts Cura on himself, a party member would be healed instead.

Another strategy you might want to try involves letting DeRosa get to max BP then just Default the next round to avoid all the damage. He will eventually stop healing himself sooner or later.