Brashperation

I use a Hinata with Brave Sword+. His high def means he procs a pretty meaningful Bonfire each round once he's in range.

Micaiah is indisputably my favourite candidate for this combo because she can activate it relatively easily using her prf. I've also seen some pretty impressive work from Reinhardt.

I like double Brazzen Atk/Def Alfonse with the Brashperation combo

Huh. I just checked and my only one is OG Ephraim.

He's not very well built.

I gave desperation and brash assualt to micaciah, it compliements with her sacrfice skill

Lyn can do it. With her weapon refine, she can do Brash Assault/Desperation/Vantage. I don't use her often though because she does get outclassed by many other red units (mages, dragons, and Swords such as Black Knight and Soleil).

I can see this setup (minus the Vantage) working for units such as Hana, Lon'qu, Fir, Marth, or maybe even Palla.

EDIT: I was only thinking about Sword units. Arvis, Anna, Shanna, Legion, Raven, Linus, Nino, L'arachel, Cordelia, and Felicia could work fine as well

I pulled a +Atk 5* Abel ages ago, and figured I should build him instead of just letting him go to waste. Plus, I didn't have anyone who wanted a Brave Lance+. So, a DB3, Luna, and the brashperation combo and he's solidly used on my cavalry team. 50x4 attack on initiation and he can kill quite a lot.

Someone recommended me to use the combo on BLyn for FGrima LHB.

and from that day on, BLyn turned into a murder machine with BraveBow+ and Luna along with the combo xD

Edit: I'll make this longer:

BLyn is Neutral IVs
Reposition
Luna
L&D3
Desp3
SavageBlow3
Brash2

As you can see, the Brash seal isn't even 3. You can save Badges and Coins. All Lyn needs to do is get ONE hit (which she can achieve) without dying either from a Mage or an Archer.

Then kaboom. x4 with Luna every turn and pair her with dancers xD This combo helped me clear the Abyssal LHBs.

My brainhardt use it.
put him in front of slow sword unit, or fast sword unit with wet noodle weapon, and he'll be slapping their mage teammates with 4x dire thunderstorm.

IMO the best unit for this combo is Cherche. Brave bows and Reinhardt are nice but keep in mind that you need the foe to be able to counterattack, in high tier arena this is an easy requisite, since everyone has distant counter. But for PVE it is often not the case...

Currently I have it on Eldigan. He is a very good candidate also because:
. He has very high physical bulk, especially with +def boon and fortify armor
. He has Fury 6! Meaning he will most likely not be in danger of dying when baiting a non blue unit. But he will still enter desperation range due to 12 dmg from fury!
. He has -1 CD on his weapon, so he can charge a special Like Ignis pretty reliably.

After you bait someone you will have a free kill on almost anyone on the next turn, sometimes even blue armors. Not many units can survive 2 consecutive attacks + Ignis with 60+ attack and 50 defense.