What is the scope of Skills are Disabled state? Meaning how can you tell which skills are disabled.
Under the Skills are Disabled state, my party members have random skills they can and cannot use and
I cannot understand why only some are disabled and others aren't. I see that all non-damage spells
such as Buffs and Healing are disabled but Attack spells are disabled seemingly at random.

I thought it was maybe due to accuracy, or maybe which of the four base stats affecting
the spell causing it but I can't figure it out. Any idea?

Are you sure you've set them to work in battles as well as in the menu?

I've only tested it in battle. State ends after battle.
I've figured it out. Skills are Disabled only applies to abilities with no Attack Power influence on the skill.
I assume it's only meant to target Magic abilities and not Physical-damage related skills which is
bad for me because I wanted magic spells to be influenced by Attack Power but I'll work around it =)

It's by the skill Atk_f
Skills with Atk_f == 0 are blocked by silence. The other stats doesn't matter att all.