Fallen Robin Review Build

I am using a +Def -Spd F-Robin, (along with W-Tharja, Zelguius, LA-Lyn, Effie, or LA-hector in Arena) With
Expiration
Swap
Ignis
N/A
vengeful figther
Ward Armor

For A-slot options i have
Warding Breath (From the free ike)
Fury3 (From 4* Hinata and F-Takumi )
Armored Blow3
steady stance (only if i Promote 4* Black Kight)
Atk/Def Bond 3 (this, i am not sure if run on F-Robin or in a +Atk -Res Myrrh, that actually use Fury-3)

I was thinking on fury, but since the use of Vengeful fighter it decrease the enemy phase use, but as a 2nd use he can run brash assault-3 seal for compensate the low hp, it is a good idea??

Any idea or suggestion about the build??

usually LA-Hector uses QR Seal
and W-Tharja Distant Defense seal