Final Fantasy VI > Chapter 6: From Narshe to The Opera House
When fighting the battle at Narshe you should have 7 characters at your disposal. Your task will be to split them up into three teams. A boss will have to be have to be confronted by one of those teams and there is a semi-optional mini-boss as well.
The characters you have at your diposal are: Edgar, Sabin, Cyan, Celes, Terra, Gau, and Locke.
Your three groups have the task of stopping the imperial soldiers from reaching Banon at the top of the Narshe cliff. It is recommended to split your characters into three groups of roughly equal strength with one group powerful enough to fight a boss.
Sabin, Edgar, and Cyan are the strongest physical attackers. They have special skills which do extra damage, and Edgar should have a few tools which do damage to all enemies at once. Put them in three separate groups.
Celes, Terra, and Gau are the only characters which can use magic so far. Magic can be used to cure, and do damaging attacks on one or all enemies. Assuming you learned the right rages for Gau, he should be able to cast Bolt2 by doing the Hazer rage, putting him on an equal level with Celes or Terra for magic users. Put the three of them in three separate groups as well.
So far you have three groups with a strong physical attacker and a strong magic user. Locke is your wildcard since he possesses no special abilities that will be useful so far. If you gained the Genji Glove in chapter 2, give it to Locke and he will be able to attack twice, making him an excellent complement for whatever group you choose to take on the boss.
Position your three groups so that between the three of them they are blocking all possible paths to Banon. Make sure you have a large supply of tonics and possibly ethers so you can restore HP at every possible chance in between battles. Switch between groups when you have the time and if possible, advance in your position to tackle the enemies sooner rather than later.
After defeating all the soldiers which walk around trying to fight you, send your most powerful groups down to the bottom of the screen, pick one of them to take out the henchman guarding Kefka, and have your most powerful group engage in the fight with Kefka himself.
