Insane Difficulty: Counter Materias - Insane Difficulty

I have been maxing out a bunch of counter, command counter, and magic counter materias but it doesnt seem like it hits very often even when maxed. Any idea what the percentages are on this?

Never mind I found it in the notes!

Wait, which notes, what are you talking about?

In the changelog file:

-) Cover + Counter + Sneak Attack
In the default game, these have a %-based chance to trigger that increases
incrementally on each Level, up until they reach 100% at Master. However,
for NT the chances of these Materia effects triggering has been adjusted.
For counter-based Materia, the chance starts at 10% (down from 20%) and rises
by 10% each time for a max of 50%. For Cover, it's the same but starts at 20%
and has one less star (this was because a 10% Cover Materia wasn't proccing
often enough early-game).

This is a counter-measure against the 'automated' set-ups that ran rampant in
older builds. Cover can still proc at 100% though if you equip at least two copies
of the Materia onto a character, assuming you have the extra slot(s) to spare.
Counter Attack works differently in that each separate Materia has their own
separate chance to proc; so having 5 mastered Counter Attack in vanilla meant
5 100% chances to counter-attack which is very tricky to balance against.

It's not all bad news, though. Counter Attack's AP requirements are very low
meaning you can quickly build it up for more consistent use and/or get multiple
copies of it floating about. Also, Sneak Attack was adjusted so that it now procs
100% of the time when Mastered, as opposed to the original game's annoying 80%.

Quick list on affected Materia:
-) Cover
-) Counter Attack
-) Command Counter
-) Magic Counter
-) Sneak Attack