In training, all you'll possess is the lighting spell, which will be assigned to the X button.
Then turn your characters into White Mages, and secure the X button down with some tape.
The "Special Jutsus", or super art techniques, are performed by a simple press of the X button when the Chakra bar is full.
Rush him and press the X button to jump over him, being careful that you don't fall off the cliff or are backed up against a wall.
Use the R1 button continuously to block and dodge his attacks, then press the X button.