Scathe

[Kahnom]

Part of the reason you still wouldn't want to rely on it once you get to optimizing your damage on the job. Using Scathe will cost a Fire IV and be a low potency hit, but will keep AF/UI from dropping so you don't lose your rotation or Polyglot timer. Have to determine which price is steeper: dropping AF/UI or using Scathe?

I know that, Last time I used Scathe was in stormblood, I believe.
Even they remove this ability in END, it won't effect me one bit.