Beat zeromus and go to the lunar ruins the first room should be yangs or Cecil's I'm going to give you a walk through to the lunar ruins here it is :-)
Kain's room boss:Lunar Bahamut Strategy: use a lunar curtain for the first couple turn and this is important you must have 3 elixirs or more and after the lunar curtain wears off just use jump and you've already won he has 50000 hp and 213 strength and defense is 2 and 18 magic 24 magic defense (resistance) it has 65000 gil and experience
Palom and poroms room lunar leviathan: hp 135000 strength 205 defense 3 magic 38 magic def 51 gil and experience 65000 his weakness is lightning and have rydia with you and have her cast meteor every turn and have palom cast thundaga every turn then just have porom and rosa for healing and have kain for backup and use double jump and boom you just made the monster cry like a little kid on drugs in wal-mart
Cecils room lunar odin same thing as lunar leviathan hp:95000 strength 191 defense 2 magic 95 magic defense 48 gil experience 65000
You know what you have an idea for the rest of the battles except for zeromus EG he has 200000 hp and he has 225 strength and 3 defense And magic 35 magic defense 202 don't worry spells work really good on him really they do gil and experience 0 :-( (but it's fun to battle him :-) ) so I recommend having your characters at least at level 78 before challenging him so just have palom and rydia cast meteor every turn and have kain use double jump (you have him right) and have rosa heal and cecil attack
You know once you have defeated the Giant of Babel, you have access to switch characters? Leave Palom (#1 black mage in the game) and take Rydia. Put Rosa (#1 white mage) at the hall of prayers too. Also take Yang, Cecil and Edge. So now you have in order going down,
Cecil Rydia Edge Porom Yang
Now try to K'O one of your front row characters or petrify him. For every character in battle (alive and healthy of petrification) the EXP gained from foes is lessened. So now you should get 2500 more exp than usual after defeating gold dragons. Keep this up and fight until you get an average of 20 levels worth in total of your party characters excluding the K'O, Petrify one. By that time, if you started with about lvl 55 with each character, than Palom should have gained an average of 10 levels and so will have Rosa. Any member not currently in the party also recieves about half the gained xp from battle. Zeromus. There are 2 perfect ways to fight him.
Cecil Palom Edge Rosa Yang
Have Cecil do nothing. Palom uses Bluff Edge uses Steal until you get 1 Dark Matter Rosa will Shell and Haste the entire party. Use Shell about 3 times on the entire party. Yang will just defend.
Once you get a dark matter, use Cecil's Crystal from the inventory. Now the battle begins.
Have Edge throw any Fuma Shuriken or the Knife if you have it. Cecil should attack once every 3 turns. After Cecil attacks, have him heal. Rosa should just Curaga(ja) whenever anyone in the party hp's is 500 below. Just repeat everything, using Shell or Haste whenever he uses Black Hole. When he uses Big Bang, start healing. Just have Palom Uses Flare or Meteor every round. When Zeromus hp is low, he uses Curaga but it only heals about 2000 hp. A single attack should compensate
Upon looking at the bestiary, it says Cagnazzo is weak against ice. However, that is not true. It is basically a typo. He is actually weak against Thunder spells. However, I have a friend that informs me that there is a time When ice CAN and DOES to a whopping amount of damage.
Baigan, that horror
When the battle starts, immediately cast protect, shell and blink on your party. During the battle, DO NOT cast ANY magic upon Baigan. He will immediatley counteract with reflect on his next turn. Just attack his right arm since it causes the most annoyance. Then beat the snot out of Baigan. If your characters have a high magic attack, then, if you don't mind that disable, then cast reflect on your weakest character. Then blast spells away on your reflected character. If your reflect man dies, cast life and cast reflect again. Remember, if Baigan loses both arms or after a while, if he only has 1 arm left, he'll cast Renew which will restore his arms.
A tip for Zeromus
Zeromus starts out with a spirit like body. Wait untils Cecil's turn and use his crystal from the items menu. NOW the REAL battle begins. Start by casting shell and protct and blink. Have Cecil and any other character attack normally. If Yang is in your party, use Power. If Edge is in the party, he should have the *Masamune and *Muramasa. Cecil should have the *Excalibur. Have Rydia, if shes in the party, cast *Bahamut. Use Pheonix downs, X-Potion, *Elixirs, *Megalixirs, *Curaja/Curaga, *Holy and *Meteor if you have all those in your arsenal. This battle will be long and hard. One more thing. If Zeromus moves around but doesnt do apparently anything, Have all your characters defend and brace yourself against a powerful BIGBANG which can do 2000~3500~ damage on all character. You should have the *Adamant armor too.
~*~ Muramasa-One of the 2 first blades you get in Lunar Subterane. When first entering with the crystal portal, look for a hidden passage to the left and follow.
Masamune-When heading down into the "crystal floor level" of lunar subtterane, there should be a swirling road that goes down stairs. Dont go down that stair. Take a small south path that leads to the sword thats guraded by Ogopogo, yes weird name, he looks and you should fight him exactly like *leviathan.
Leviathan- King of summons. Head down the cave of summons and go to the library. You should have *float while going down. Rosa lears float at lvl 35.Cast float on your party at every floor. You take 50 dmg everytime you touch lava. At the library, prepare for a battle against Asura, queen of summons. Simply cast reflect on her, protect on the party, as well as blink, and fight her WITHOUT ANY spells. She is basically suited up against magic. Asura will attempt to cast support spells on herself. With reflect, youll reap the rewards. Afterwards, heal ad save in the nearby room. Then talk to the old man. You'll fight leviathan. Just protect, shell and blink yourself and bust away with either Ramuh or Thundara/Thundaga- which you SHOULD HAVE by now.
Full-Life-Rosa lvl 45, Porom lvl 55 Holy-Porom lvl 50, Rosa lvl 55 Meteor-Rydia lvl 60? I think.. And Palom should be 60 too Bahamut-cave of bahamut, near east end of map on moon. MUST have leviathan summon. Just cast reflect on party and fight. Dont use any cure spells. Bahamut will literally KILL HIMSELF! Excalibur-during your trek down sylph cave, pick up the rats tail. Give it to the man in the cave south of mythril. He'll give you some adamant. Take it to the smithy who lives south-east in underworld. He'll craft your Sword of Legend into Excalibur. Adamant Armor-Lunar Sub. B5, use a siren where you got the red fang. Fight Flan Princess until one drops a pink tail. Go to the cave near Mythril. Get the hovercraft. Give the tail to the man to get more adamant ore. Give to the smithy who lives at the south-east end of underworld. Must have already given him adamant orethe first time.