Fun semi-broken sounding idea PLD gets a JA like Retaliation except it works on shield blocks and deals the damage absorbed back to the monster so if you block 100 damage and take 40 the 60 get dealt back to the monster. Keeps shield sizes from getting super broken and keeps Aegis/Ochain broken in comparison. Making it an ability with the duration of the recast allows it to be dispelled gimping PLD but allows them to full-time it otherwise. This gives PLD a way to deal damage while taking damage (discourages /NIN which SE seems to dislike). Also gives PLD a better shot of doing enough damage to warrant using a PLD over a DD as a tank.