Walkthrough

I've divided the walkthrough into separate sections based on the recommended HP you should have before attempting the quests.  I'll admit- the walkthrough is a bit dry, but it will tell you exactly what to do and where to go.

Introductions:

Julian	Ellen
Thomas	Sara
Mikhail	Monica
Harid	Katrina

150-250 HP

• Transport Goods from Lance to Farce and Yamas.
• Catch the Pets in the West Forest
• Defeat Algernon, the Genius Rat
• Find Gon in the Devil King Palace
• The Adventures of Robin

250-350 HP

• Fish Hunting in the Ice Lake
• Enter Muse's Dream
• The Treasure Caves around Great Arc

350-500 HP

• Travel the Naj Desert to the Divine Tower and the Mung Tribe (Quests in the East)
• The Crystal Ruins
• Get the Dolphin Statue with Herman
• Solve the Problems in Moses
• Seal the Water Abyss Gate

500-750 HP

• Complete the Holy King's Trials
• The Maximus Quest
• Save the Fairy from the Traveling Circus
• Defeat the Dragon Car
• Zweig Tournament
• See the Aurora Borealis then Go to the Ice Galaxy
• Seal the Earth Abyss Gate

750+ HP

• Clear the Rotten Sea Ruins
• Clear the Ancient Cave
• The King's Capitol (Harid only)
• Get the Holy Grail from Leonid's Castle
• Seal the Wind Abyss Gate
• Defeat Gwayne
• Seal the Fire Abyss Gate
• Battle Against Huang City
• Final Dungeon