About Bluff I wrote before so I just copy paste it ..
Bluff is a debuff of 3 components 1 drop target, 2 stun, 3 show back - 1 part is influenced by men and mdef. 2 is influenced by con and has a 10% less land rate than stun shot; 3 part is unknown but I'm pretty sure it acts the same as other kind of debuffs and anything that gives resists for abnormal state works.
It was on reliable source but I dont have link right now as topic was locked and no longer accessible DO NOT HOPE TO LAND FULL BLUFF with drop target, stun and turn back.