Grand Hero Battle - Clarisse

Xander:
A: Flexible
B: Quick Riposte 2 or 3
C: Spur Def 3 or Ward Cavalry
SS: Distant Defense 1
Assist: Flexible
Special: Blazing Light

Camus:
A: Flexible
B: Flexible
C: Goad Cavalry
SS: Hone Def 1 or Hone RES 1
Assist: Draw Back
Special: Flexible

Reinhardt:
A: Death Blow 1, 2 or 3
B: Flexible
C: Hone Cavalry
SS: Hone RES or DEF
Assist: Swap
Special: Flexible

Elise (Must not be -ATK)
A: ATK + 3
B:Wrathful Staff 3
C: Flexible (My Elise didn't actually have one)
SS: Flexible
Assist: Recover
Special: Flexible
Set up: Xander must start next to Camus and Reindhart; Camus must be able to break the wall from below.

1rst Turn: Camus breaks the wall whilst staying away from Clarise's range, Xander attacks the red cavalier, Elise is next to Camus' right and Reindhart is next to Elise's right.

2nd Turn: Move Camus below Elise, move Xander to Camus' former position, move Elise below Xander and use Recover. (Do not F***ing move Reindhart)

3rd Turn: If everything went right, there sould be a Ninja in the "Fort" and Xander should be able to use Blazing Light to kill that unit and damage the Blue Mage, kill the Mage with Elise (Thanks to double Goad Cavalry and the damage from Blazing Light), Draw Back Xander and kill Clarise with Reindhart.

Turn 4: Kill the Sword user however you like.

I hated this map. Really, at the end of the day, it's the Armorslayer that ruins it for me. I still got it done, though.

https://www.youtube.com/watch?v=LYl0WtGbnsQ&t=2s

https://youtu.be/Y_UmlxbDsmA
In short:
Use Clive to distract and eventually kill the blue mage. Can be replaced by any horse with low res
Use Elise to boost the others and kill the blue mage. Also works fine if you put a performer in this slot.
Use Katarina to kill the red cav. Any red mage is good.
Use Robin to kill literally everything else. You should really use him.
Watch the vid for more info

Xander can actually tank a lot of damage in this map while have both support at S rank and a fortify cavalry boost. With quick riposte, he is an absolutely tank in this map. Reinhardt is there to clean up the map as well as providing support to others. Azura(could be swap to any other dancers)is there to support the team using dance. Black knight is there to watch the team's right flank to watch the blue mage and the red sword unit. Xander should survive this map with 4 hp.

It took me 5 turns, Ninian and Eliwood completed my team as I had answers for 4 of the units with Robin and Ike (who are ally support S) but was stumped with the Gronraven cavalier and safely getting out. I had Robin bait the theif and Clarisse, since he had triangle adept and quick riposte he took out Clarisse, but left the Theif with a bit of health. The Gronraven wielder gave me trouble, so I brought in Eliwood with his movement and color advantage to take him out, but I still needed someone to safely bring him back, so Ninian was the obvious choice (any dancer or any red cavalier with reposition will do although the red attack has to be 50+ on initiation). After those turns where I took out the Gronraven user and Clarisse, I aimed for the Theif with Eliwood, but doing so left him in danger to the red cavalier. This was a bit specific for me, but I had Robin attack the red soldier to get his Bonfire up, then danced him with Ninian, then had him one shot the cavalier. There was some instance I forgot about that involved Ike and the cavalier...I don't remember, but bonfire made it just one point above his HP which was 36 at the time, also the cavalier has Aegis, so keep that in mind.
Anyway, the blue mage attacks Eliwood, he takes it like a champ (he is on the stone slab), and the next turn is Robin finishing off the soldier, dancing him with Ninian, then repositioning Ike with him to have Ike finish off the mage.