Beat Clea Unleashed so now I'm officially done with the game.
She is the easiest out of the new bosses. I know I said Duollistes but it has two phases. Clea doesn't actually do anything, she summons Nevons that attack for her kinda like the regular fight but she can't be harmed until you parry an attack chain. If you miss a single parry, she summons Nevons forever until you parry successfully.
So all you have to do is parry like, 5-6 times in a row and then kill her in a single turn. Which is easy with Lune, Verso, Maelle....basically anyone. And even when she's invulnerable you can still stack Burn, Defenseless, etc. on her for when it's your turn.
Speaking of Lune, the weapon Cleim she gets from Clea is WILD over powered. It ignores elemental immunity, meaning it can damage any enemy with any element. Ice with ice, etc. Also it mirrors any skill damage you do, similar to Simoso. Also, if you have 4 different elemental stains it does +200% more damage on the next skill.
Fred.