Fighter's Power Reflection works against 1/1

Pre-Ascension, which was the last time I did a Pap run, when I got 1/1'd with PG up I was left with ~25% of the HP I had before the attack. Definitely not half. My Achilles was/is at 5, so it's not having as much of an effect as PG was.

Um...
Power Guard blocks 50% of the taken damage.
Half of 50% is 25%.

So, while I thank you for your contribution, I'm a little terrified at your conclusion.