It only works on altar of balance(boss),thunder hammer(duel) and SOR(gardosen).You should be in second job,the {increase}skill is lvl 1,the {increase}OS in lvl2,and the offensive stancelvl1 In the altar of balance create a room with party or not(party is recomended)defeat all monster until you reaches boss.Climb on the top activate the offensive stance,wait for the scale of death activate the increase skill(be sure the bubbles hit you)then juriore will die instantly.
thunder hammer duel,go to his back,activate offensive stance then wait for him to cast the blue thing that chase you,the casting of that is fast so before that thing reach you be sure that the increase skill is activated already.
SOR(gardosen)this is a chance of picking up gardosen,activate the offensive stance,wait for the whirlpool(a tornado or cyclone)that sucks you then activate the increase skill. Gardosen die instantly.NOTE:THE INCREASE SKILL IS ACTIVATED BEFORE THE ATTACK HAPPENS SO BE FAST.sorry for the wrong english sentences i don't think speaking tagalog is permitted here