So, I've got a question about this Arch Angel Costume Box that can be purchased via Item Mall...

First question:
Does each costume box only give 1 piece of the Arch Angel costume?

Second question:
Can anyone give an accurate estimate of how many costume boxes will it take to get the full Arch Angel Costume Set?

Any help is appreciated.

PS: I hope I posted this thread in the right place. If not, please let me know...