This is Geomancer in a nutshell. Geomancer is not good at a lot of things right now, but Geomancer is VERY good at putting a 13% Defense Down effect that can sometimes go up to ~15-25% with certain job abilities.
Being that the job isn't good at much else, I'm not sure where Geomancer would fit in a small groups or even six-man parties as a mage who can't heal that well and isn't Bard. I could definitely see a Geomancer sitting in an alliance's "Misc. Non-Melee (and One Sad Thief)" party while laying down Geo-Frailty Luopans anywhere that melee have to eat Pizza, though.
