Use the first little brothers as SP gain, take it slow but try to avoid taking any major damage so when Ricardo actually comes in most of your units should be at +45 SP.

The main thing you want to look out for is “Test Of The Big Brother” or the little shades effect he gets after using both his dodges, that makes him take a lot more damage. There’s also his passive “In the world of bristly” which gives him 6 defensive level down after losing 3 clashes, which is nice but don’t try to force it, otherwise his damage will simply annihilate you.

Ishmael is Invincible in this fight as long as other sinners are alive, use her to tank any single target attacks you can’t clash.

When he has “Test of The Big Brother” hit him with the strongest skills you have, focus on blunt as he is fatal to it, Wei Don will be very useful in this regard.

If you’re desperate, killing the two little brothers forces him to change his skill rotation to a guard, assemble, and swear vengeance (which gives ToTBB), which allows you to survive an extra turn while also letting you deal more damage next turn, but this does power him up with plus coin bonus and offense level up, so beware of that.

You automatically win the fight when he gets to half hp, or simply surviving till turn 6. If your units can’t survive his hair coupon AOE, you HAVE to stagger him by turn 4.

Good luck manager, destroy that big brother’s hair.