This is your lucky break players who want to inflict major damage in a short amount of time. what you need to do is get a dark knight. equip him with anysword it doesnt matter. than when you get into battle make sure that everyone except the DK is in guard. than use SoulEater. this move will give aroung 1000 damage to all enemies on the field. you can get this job when you get to the surface world and the 3rd crystal. i had a lvl 54 blacknight at job lvl 1 that did 7065 damage to everyone on the feild. good luck