Before you go to 'Hocus', buy lots of magic items from the item store and make sure that all your characters are atleast at level 6.
Sandra special soldier: Only use physical attacks against him and don't waste your magic items to try to defeat this guy. When he transforms into three, the one that uses magic is the real one. [If you can't figure out the real one, than keep doing guard]
Kongol: This guy is very strong!!! Only use magic against him. [If you use physical attacks than you will be counterattacked with more damaged hp to you!] Keep using magic attacks and using the option 'Guard' which will restore your HP.
More damage When you are in battle with a character that can do Additions and you select Attack and you are charging at the enemy as the outer square closes in on the inner square press the X button just as the two squares hit and if your timing is done right you can hit them an extra time giving you more SP and dealing out more damage. With different Additions you can do more and more damage.
Kongols spirt Dragoon
An easer way of getting Kongols spirt dragoon is to buy it from the merchient in Lohan ( the one who sells you the water bottle). Kongol must be on your team.
Tips on Defeating Bosses
Whenever you are about to fight a boss make sure Rose is in your party. You can tell your about to fight a boss if u find a save point deep into a dungeon. Have your SP to the maximum for each party member and make sure that each member can transform into a Dragoon. Once the battle starts use Rose's special and cast Astrol Drain as many times as you can. I've been able to do up to 400 points of damage with it on the first disc. After the special wears off keep using normal attacks and additions so that your spirit gets to its maximum fast enough to use another special. Also, if you have the power wrist equipped, use the special of that person so that a normal Dragoon attack can deal near 200 points of damage. Make sure you have plenty of Heeling Potions and a good amount of Mind Purifiers incase the boss can cast status effecting magic (like the beast in the Hellana Prison dungeon.) Make sure you save often because bosses often come in pairs of two.
