Expensive Ayra build

So today on the new BHB banner, I got a -Spd +Res nephenee, and since I already have a better one, I am going to give someone wrath. I am thinking of giving it to Ayra since she is my most powerful unit.Here's a build I am going to run on her.

Weapon: Firesweep sword+
Assist: Reposition
Special: Regnal Astra (Aether?)
A: Life and Death
B: Wrath
C: Threaten def (Can't think of anything worth using that's expensive haha)
S: Attack +3 (soon the squad ace variant for looks but I need to get it first)
S rank summoner support, S rank ally support and depending on if the legendary hero for fire is good and the boost is attack, fire blessing.
What do you think? I'm going for a hyper offense build with some expensive flair. Something to strike fear into the hearts of anybody. (And I will send it to Sagemaster 15 too so lets see if Jay dies.