Healers: Your heals are NOT more effective on WARs than they are on PLDs.

[Nalou]

...

Are you sure stoneskin/Aldo shields benefits from personnal damage reduction buffs (like shield Oath or Vengeance) ?

I see these as shields, so something that proceeds before our characters are hit, as if someone else was hit instead of me. So while my stoneskin is damaged, why would my own damage reduction buff apply to it ?

I could see abilities lowering monster damage like Storm's Path or Rage Of Halone lower damage done to stoneskin/shield.

[xAlice]

Wanted to offer my thanks for the in-depth analysis on the why it seems that way.

It's probably one of the first things I picked up, healing my tank partner back when he had lower level gear on his PLD and WAR. Why? Cause I was allowed to be lazier healing his PLD.