I'm surprised there's been no special that protects from ALL damage, ranged or adjacent, but for a lower % reductionBuckler isn’t the final skill in that tree, Escutcheon and Pavise are, but Golden Dagger kicks his cooldown down 1, so Pavise and Aegis are ready to go on turn 1 with Shield Pulse.
But I don’t know if permanent DC is worth having the Res laid out in the open for mages to hit. Seems better to have Aegis (or Pavise if you’re in armor and dragon tiers) ready, Breath back down to proccing again while still getting your counter hit, and be ready for round 2.
That would be a pretty good wall with the Brazen Atk/Res seal now that I think of it.
Or shoot if you make it a tier 3 500 SP special you could keep the damage reduction. Seems like a no brainer for an exclusive skill if nothing else