Using 1 Wing, I made only 2 Titania barding.
Then I tried Seiryu Barding, and I spent 2 scales without having a Reuse proc at all.
Then I tried Suzaku Barding, and I spent 1 feather without proc.
Well, it didn't feel broken for me. Perhaps I'm just VERY unlucky? :/
I wish it had proc more for me...
Now, wait a minute. Are we really going back to that RNG game again? Oh fxxk me...