Maxing out Guilt for 9 Heartless will still result in you being rewarded the second Orichalcum. Here you go, the mission details itself:
In addition, you'll also get 100 Mog medals if you manage to do it by the 9th, 23:59pm Japan time.
In addition, you'll also get 100 Mog medals if you manage to do it by the 9th, 23:59pm Japan time.