Defensive stance is not giving the 10% block mitigation. It is giving the block cost reduction. Im on PCNA. I tried with just a sword and shield on. When i equip the sword and shield without any skills, i get a bump to block mitigation from the skill line. When i put defensive stance on my bar with my sword and shield, my block mitigation stays the same. I tried taking all skills and gear off then reloading ui. Then put defensive stance on front bar, then equip sword and shield but block mitigation only comes up the 14% from the skill line passive.