Lufia: The Ruins of Lore

In the Ancient Cave on the 17th floor is a floor boss called the Parasitic Cell, if you've learned Miracle Hit and are above level 23, you should be able to defeat it by using Miracle Hit every turn. It has 1250 HP so you'll be fighting for a while. If you win, you will receive 20100 EXP.

During your adventure, you will need to search for Alchemists to learn how to create special items in the Blacksmith Building in Gruberik. The Alchemists are disguised as animals, people, and monsters.

The Egg Ring is the best one you can wear. If you wear it on your character, you can attack two times. If you attack with rapidfire, you can attack three times. Now, no one can stand in your way. You can find it on floor 59-60 or you can get it by killing the boss on floor 60, to beat the Ancient Cave.

The Lucinia Armor armor is the best Armor that you can find. When the enemies damage your hit points, your HP and MP are automatically replenished, but sometimes it does not do anything. You will also see that miracle is being used. You can get the Lucinia Armor on the 36th to 60th floors.

The Divine Helmet is the best that you can wear. It is found on the last two floors of the Ancient Cave.

The Gaia sword is the most powerful weapon. You can find it on the 60th floor of the Ancient Cave. You will need some luck to get it. When equipped, the Gaia sword boosts your attack power a great deal.

Once you reach the town of Ordens go to the item shop and buy as many Blue Teas as possible for 100 gold each.
Then you can sell them back for 150 gold each. You can make between 50 and 4450 gold each time.

After you can enter the Ancient Cave, buy yourself a suit of Bronze Armor and the best weapon that you can buy at the moment, kill off your party members and get have the main character train as a Swordsman. Get him to level 10 and enter the Ancient Cave, if you can defeat the boss on floor 9, you'll get 6000 experience, make sure you have a providence because the monster on floor 12 will be able to do 80+ damage to you. I was level 25 and it was doing 97 damage to me. Repeat this process to gain levels very quickly. It's also a good way to master classes.

Go to the blacksmith in Gruberik. Make sure you have the ingredients for a Nectar (and found the alchemist). Make a Nectar. The blacksmith will make the item like normal, but you won't lose the ingredients! You can get infinite Nectars at no cost.

If you find an enemy called Hawk, fight it constantly, it has a chance of dropping Speed Sources which boost your speed permanently by 2-6.