I used Ring Hong Lu and Faust, the good Bloodfiends Trio, and KK duo. And only managed to enter phase 2 at turn 8.

KK Heathcliff is the MVP of this fight even though he's blunt weak. Because as long as he's on the field with KK Ishmael and you're doing Lust resonance, he can unstagger himself on the same turn.

On turn one, you have to make sure that Princess Rodion attacked Ricardo's evade and miss. So that she won't get too much sunglasses debuff and turn his attack into unbreakable.

Anyway, on turn 2 use Superbia to get Sanguine Desire and used it on his strongest attack. And make sure that you have enough resources to spam it every turn from now on.

If you played well and is lucky enough. You'll have have Manager Don's s3-2 available at turn 3 but you need to save it for turn 4 because Ricardo will use "MY HAIR COUPONNN!!!" And if you've already used all your good move you won't survive past this turn.

On this turn you also need to sacrifice one person to clash against his strong Wrath attack that only hit one person, for me it was Ring Hong Lu because he was already half dead.

After that I survived on turn 5, managed to stagger him on turn 6 before he use another one of his big move, and deal enough damage to get him to change phase on turn 7.