
Originally Posted by
Elurra
Materia used always goes in order. For example, 44 crit is 11 Crit I materia, then 11 Crit II materia, then 11 Crit III, then 11 Crit IV. That's the bare minimum you will need to get 44 Crit, but the chances of success start to go down, so unless you're extremely lucky, you will need more than that. By the 11th Crit I, you'll have a 60% chance of success. But after that, it's back to 100% for the first Crit II (12th overall). Same when you get to Crit III and IV.
For Determination which can only go up to 31, it's broken down like this: 7 Det I, 8 Det II, 8 Det III, 8 Det IV. The success rate drops more for Det, though, and the last one in each set will have 50% chance of success.