Even with 50% crit chance, the issue will still be how strong it is for how much it cost that it's still mandatory to use in nearly every damage build. In a way, you can treat the 50% crit chance like a potential 25% final damage steroid that goes up even higher as you have more crit damage. Build like Crossbow will need it even more because they shoot much less often so every shot must count.
I would go with the whole "disable usage of skill" because if we only look at force-crit basic hitting, only 3x shot from a highground ranger really comes close to being super strong with rage.
Leaving it to "AI action" type or rage will make it extremely tedious to go against enemy swashbucklers that just leap into your face with Phoenix dive and cast it on you (they always do) and with how bad the AI is, this further forces everyone to have high-wit build or you can potentially lose the battle from getting enraged by the enemy.
