After you recive the last reward package from path to awakening , it will expire in 30 days i guess like the other's . In this time you will be able to gather enough adena to buy another S gear ? I see most of S gear very expensive , i'm lvl 63 atm and have like 7M adena , and i see most of armour S sets like 100-200M .
76 package is 90 days when iam right. and in 90 days you can easily make 85++ and get some R which is not hard to get. btw low S grade can be bought at Giran luxury shop (edit: and they dont cost there 200 milion) . Try to take a look there.