Honestly Co-Op is great way to get crystals if the dungeon you need isn't up. I'm already at 677 small purple, 276 medium and 90 large prepared for Squall and the actual dungeon opens tomorrow.
Speaking of, if anyone needs help clearing the Co-Op fights I'll be able to help. :)
Speaking of, if anyone needs help clearing the Co-Op fights I'll be able to help. :)