Here are some hints and tips for the game:
After you kill Xantan, leave only when you get the Piece of Smooth Glass and Piece of Rotted Cloth.
Don't forget to take at least two of each tiny gem and at least four of the Tiny Obsidian before leaving the Dank Cave
Before tackling Jahbal on Evil, fight him at level 49. That way, the 5k exp. will give you an automatically level up, and restores your character's health. You will be prepared to fight Mastermind that way
Never destroy any items. Those items can be useful. If you destroy them and you need it, you spent a lot of work for nothing.
Go to Sunny City before going to the Mt. Fortress. That way, you have the Keladrian Medallian while you are in the Fortress and you do not have to travel back to Sunny City.