Talk:Heracles/@comment-77.181.100.161-20170801161215/@comment-75.142.224.95-20170802071630

I stand corrected (I posted the previous comment). Turns out grailing a 4* unit is OPTIMAL. The general consensus is that because grailing a 5* unit only awards two levels per grail, the stat growth is negligible per grail. Whereas, the first two grails on a 4* unit award FIVE levels. But, the next five grails only give two levels.

TL;DR: Grail any 4* and below unit up to level 90 for maximum benefit/effeciency. And only grail units that you REALLY like up to 100, as it is less than optimal per grail.