In the Shadow World, there is a Grim Reaper that pays gold for Spirit Orbs. After you have obtained the weapons for each character from him, he buys the Spirit Orbs for Florins. Use the save point after the bridge then go through the gate and kill all the monsters. Leave, then go through again. The monsters will have respawned. Keep collecting the orbs and sell them. To save a lot of Florins during the game for weapons and armor, kick over every barrel and box that you see to get the free items and not have to buy them from the stores. If you want fast Florins, sell all of the items you find to the shops.
Note: To do this attack you must use either Tal or Buki. When fighting an enemy, press X(2), A then follow it with A(3). The last button combo will juggle the enemy, and does more damage then a regular attack.
Go back down to the mines and defeat one creature after you get the crystal for the professor. Note: Do not use the portal.
After you get Ailish in your party on your way back to Haskilia, you will pass through Noland Farm. Go inside the house and go downstairs to find a chest containing a weapon for Tal called Hukin's Fate. This sword casts poison on enemies.
After you get past the Shadow World and return to Haskillia, go to the closest blacksmith. Then, with Elco, use his Ion Fluxinator gun and get two Razor Edge power ups. These give an extra 35 strength points each.
When you reach the city of Transentia, find the elevator and take it to the floor with the university and Kamo's item shop. Just outside the item shop is a ladder. Use Tai to climb it and a robot will tell him that he can challenge the Prototype Robot Warrior. Note: Only Tai can challenge him. Climb the second ladder and the fight will begin. This is a very difficult battle, however if you use the following strategy you will win. However, this requires time and patience. It is also recommended that you use a weapon with a high critical and moderate strength. The robot has few attacks. One is a single strike, the next is a double strike, and its most powerful attack is a charged 360 degree that will instantly kill you (you cannot block it). When the battle begins, run to bottom left corner and start blocking. When he starts to attack, wait until he does the double strike attack (it has a yellow streak). After blocking the second strike, hit him once then start blocking again. Repeat this until he charges up for the instant kill attack. When he starts glowing, run to the opposite corner and the attack will not reach you. After the attack, run back to the first corner. This corner is best because it has the least camera problems. Repeat this process until it is defeated. By following this strategy you can defeat the robot without getting hit. The fight will take some time to finish, but you will win. Once the robot dies it will drop a large gold bar that you can sell for a lot of Florins. Open the chest on the platform and you will get another of Tai's Wolf Totems.
Power up Tai as much as possible. Have a lot of SP Restores and a very strong sword. The Master is extremely powerful and is very fast. Keep using the Tai Earth attack and you should defeat him.