[lalchi]

My critic would be for absolute pace, for pretty much the same reason stated before.
Combined with skills like guard or power up. This is an easy proc.

I think that if you take off the counter attack on the effect. It would already be much more correct ? (especially if we consider that most duelist PROBABLY have riposte) Maybe add a chance proc based on luck/guile/any stat that seems to fit + LV rank

I do like the idea that a Kensei becomes more and more dangerous over the time of the fight. But due to that, i feel like it's important to not give him defense ability that would make it simple for a kensei to stale on fight. Since the adversary goal at that point would be to shorten the fight as much as they can.