User blog comment:Reikyu/Plot Armor Part 2/@comment-76.168.15.61-20150330175027/@comment-25477086-20150402073336

80+5 = 85 attack power (torpedo), line ahead, parallel, no other mods

The problem Mr. Green, is that the He torpedo deals base damage of 85. Akizuki has 53 armor which means anywhere between 35.3 to 70.6 damage reduction. It is possible that Akizuki rolled a 56 on her armor, resulting in her taking 85-56 = 29 points of damage. It is also possible that her armor rolled between 35.3 and 48 proc'ing overkill damage which might have resulted in the 29 damage you have taken, but unfortunately we can't know for sure.

Ideally we would want something to hit akizuki so hard that we are absolutely sure regardless of whatever armor roll Akizuki might make, that overkill damage would proc. Akizuki would make a good test subject for testing 78.4% with her 37 HP so I'll keep her in mind. Unfortunately there aren't any good places to run that kind of test currently.