Quote Originally Posted by HaelseMikiro View Post
Honestly, if you're going to max out rank III's on crit and Det, you may as well also do the rank IV's as long as they're at 100% Infuse chance. Considering the risks you'd just finished taking with blowing up rank III's at 50-60%, 100% rank IV should still be worth it
This does kind of depend on the server you're on, I'm glad I finished my Novus already, because as it stands the grade IV crit materia go for roughly twenty times the cost of a single grade III crit materia. Which makes it pretty likely that putting in even one grade IV is more expensive than what you'd previously spent on grade III's.