[Colarmel]

Only the highest applicable Deflect counts. Defending Shield or Defending weapon apply to all defenses using that weapon. Generally with a million copper and free choice, you want Deflect on armor and defending on the other stuff, since it costs the same and you're less likely to be without it.

But if you have deflect +2 on a DB 2 shield it's effectively DB 4. If your skill is 14 without combat Reflexes this makes your block with that shield 14. If you add defending Shield +3 it's a block of 17. But the DB on a Parry or dodge is still 4