Seeing this again, I gotta wonder... how did someone even get this strong? And with a unit that's honestly quite bad...
except discord causes my comp to crash for some reason.... and reinstall windows....
so I agree with someone i knew before where they called it "Discard" instead of Discord
it's only worth it to get new girls... maybe new "treasures" too (the weapons and accessories)
otherwise, stick to the friend/normal gacha to farm 1* shards... save your diamonds for refills on arena or AP.... maybe step up gacha where your chances are much better (it's how I re-rolled isabelle)