Board Thread:Questions and Answers/@comment-26956284-20150903222509/@comment-26970572-20150909201127

I wouldn't recommend feeding your 3*/4*'s to your 5*'s for various reasons. For starters, the amount of xp you get from these units is incredibly low. It would take almost all of your units to actually get somewhere level wise. Instead, I would recommend selling those units for medals you can use in the medal shop. At the medal shop, you can buy a wide variety of things from unit capacity, AP/BP potions, and Grimoires. If you do plan on selling your unwanted units for medals, here is a tip. I recommend maxing out the unit's loyalty because you get double the amount of medals.