Geomancers are a special magic class. While they can attack with various bells, their special ability is that they can cast spells for no MP based on the terrain of the battle. In addition, all terrain carry a small chance of casting the powerful Shadowflare , which deals thousands of damage even at low job levels! Geomancer is a job that requires a lot of investment and care, as the amount of damage you do goes up based on your job level.
One of the biggest drawbacks of the Geomancer class is its dependency on the terrain . If the terrain provides very poor spells, then your Geomancer will be next to useless aside from attacking with bells. Also, every type of terrain in the game has multiple spells that have various chances of being activated, meaning that there’s a chance you could activate a spell that doesn’t do the damage you need to succeed. Geomancer also faces a lot of competition from Evoker and Summoner. I recommend you have a Geomancer character be masterful at another job so that if you find yourself with bad terrain, you can still have offensive presence.