You cannot die to J3. Timing, I should specify as when the flashes/explosions start after his death.

I just always called it last hit due to time taken to split after that final hit is input. i usually hit split after he died when the flashes/explosions on the tree start. It's hard explain with words, it's a visual split for me. Let's see what we can cook up for explaining it.

I just removed my flag overall, in the end. Guess it doesn't really matter where I'm from. Although, I'm proud to be British and in no way, shape or form proud to be English.

Just curious, considering looking into this, and some notes would be an awesome place to start if anyone has any? :)

I have no written anything up, myself. Crow has a Mage Route guide on GameFAQs, I can easily write my notes up, should you be interested in learning the run :)