Strategies
These are some helpful strategies that may help you on your quest.
Make sure you have weapons that suit your character well. I suggest the sword for Randi (always), the whip or gloves for Purim, and the spear or axe for Popoie.
Early in the game, make sure you stock up on healing items before entering a new place. Neko will usually sell you stuff while your in trouble, but he is very expensive.
When you enter the Upper Land, make sure you have some medical herbs with you.
After you receive the Shade and Luna spells, LEVEL THEM UP!!! They will be invaluable to you against bosses and the harder areas of the game. Shades dispell will break the Wall spells most bosses you will face. Also, Luna's MP absorb will be very useful in the Pureland where you will most likely run out of magic.
Take some time to level up Lumina, you will need it in the Mana Fortress.
Take your time and enjoy the game!!!