Quote I asked Senior Game Balance Designer Jason Attard about the Accuracy on attacks from Operation bosses, and he let me know that the default boss accuracy is 100% for special attacks and 90% on basic weapon attacks. Any accuracy debuffs applied to the boss (or defense buffs applied to yourself) should reduce the boss's chance to hit. We do have the ability to increase accuracy dramatically for a special attack if we want to guarantee that it hits, but typically that only occurs for abilities that are critical to fight mechanics.