One of the more famous examples among the fanbase is using the Calculator mage to cast Holy on every enemy standing at a certain elevation that is also a prime number. Part of the reason Final Fantasy Tactics is so brilliant is how unbalanced it is depending on the approach you take.
Height must also be taken into consideration - those who stand on the high ground can deal more damage to enemies below and vice versa. Understanding how the terrain affects the flow of combat can be your key to victory.
In battle, grid-based movement combines with traditional strategy mechanics to create a remarkable level of depth. New jobs are constantly being unlocked over the course of the game, allowing for a massive amount of combinations and endless hours of replayability. This meant you could have a dual-wielding Ninja with a Monk's high HP and the ‘Jump’ ability of a Dragoon. Every job can also be leveled individually, and once a skill has been mastered, you can equip them to your person permanently.