Fire Emblem Heroes Saias Grand Hero Battle Infernal
I'm pretty sure Summer Elise can be replaced with any green mage like Nino, only there to take out the blue armored. I dont think Azura's C skill is needed, but if something went wrong due to that skill im sure it can get replaced with +3 speed seal on Black knight, Armored Boots isnt needed.
IV
Black Knight: Neutral
Performing Azura: +spd -res
Brave Lyn: Neutral
Summer Elise: +spd -def