wtf. I just typed this out and Firefox crashed. ****.
Anyway, you'll level up ALOT in the final dungeons. Alot. Like the Moon in FFIV. If you aren't feelign confident, hang out in the first floor of Sylx to level up, and rest in the Invincible. Immediately go to the Forbidden Land Eureka first, to raid it of the legendary equipment, among other items. (You'll go through more of those trademark false walls, of course. Alot of those in the final dungeons.) You'll collect Excalibur, Masamune, the works, along with the 'ultimate' jobs, Ninja and Sage.
At the end of Eureka, you'll find a shop that sells the best equipment in the game, as well as other items, magic (Including Bahamut and Leviathan if you got them previously), and Shuriken, of all things. I want to say they cost 20,000 Gil, but I'm just not sure. They're expensive, but you can easily raise money (and levels!) by going through the dungeon multiple times. I bought around 20 Shuriken, and they carried me through the final bosses just fine.
I changed my party to two Sages and two Ninjas (how original), and leveled to the 50s. (Lv~55 should do you fine for the final bosses.) For Zande, I didn't use any Shuriken. I just Hasted the Ninjas and smacked away. (Two Weapons/Haste= Big Damage.) He may waste a few of your party members, but you'll win eventually. You may want an occasional Bahamut (I bought an extra for my second sage), but chances are you'll be spam-healing Cure 4 because healing sucks in this game. (Zande has powerful global attacks like Meteo, of all things. Ow.) Savestate, if you aren't against that.
In the real final dungeon, the World of Darkness, you'll encounter four more bosses. I held back from using Shuriken until the 2-Headed Dragon. I put everyone in the back row so we don't die in one hit. Ahriman and Echidna were reasonably tough, but the 2-Headed Dragon was horrible. (~9,000 Damage an attack!) Haste the Ninjas the first turn, and then chuck stars at it for major damage. It should die in a few turns, but you don't want it to drag on long anyway.
In the final dungeon, you'll find four chests with Ribbons, probably the ultimate headgear for all classes. You'll need to fight a Zande Clone to get them; but he's vulnerable to death so just cast Death to spare yourself a draining battle.
Finally, for the Cloud, Haste on the first turn, and chuck stars until you run out. It (she?) only has ~45,000 HP, so it won't last too long. No Bahamut for this, only spam healing. It casts Flare Wave every turn, it isn't creative, it just wants you dead. If you run out of Shuriken, use two legendary weapons, and keep smacking her. Eventually you'll witness that trademark 'dissolve into nothingness' that every final boss has to deal with at some point in their existence.
That's all I can think of. Good luck, and enjoy the music, it's awesome.
