You will have an oppurtunity to save after defeating Baralai. That is a good strategy, especially using the White Mage to constantly cure. However, if you are having MP troubles then Alchemist may be a better option if you have learned Mega-Potion. The Black Mage should have no problem with MP if you have learned MP Absorb, and Dark Knight is better than Warrior if you equip Sprint Shoes or some other Agility-enhancing accessory. Just take some time out to learn a few skills first. The battle with Baralai is the only oppurtunity you have to learn Drill Shot, which he will use after being attacked 10 times, so make sure someone is a Gun Mage at some point.