I just was not getting it with either solution. If other people were, more power to them. I tried for 20 minutes.
I saw the comment posted by THE Mr Fill in one of the solutions. I was going mad with this before I saw that. Since I hadn't looked at the comments before, I never noticed it, and since he didn't post a solution, I'm doing this for others who are frustrated like me. All credit to him.
Get 2 controllers and go into Practice mode. You need to counter a few times, so a second one works really well. If you don't have a second, THE Mr Fill noted that you can use Record from the Practice menu, but I couldn't get that to work either. I used a 2nd.
Set Instinct and Shadow to Infinite. Hit
on the 2nd controller, then immediately after press
on your main. You'll see "Counter Hit" on the screen. Then do it again. And again. Keep doing it a few times.
It took me only a few times to do it. It might have been because the game registers the entire time as one Instinct activation, so keep that in mind.
I really hope this helps. KI drives me batty sometimes. Best of luck!