I truly hope that Geomancer is not the next healer. I can only imagine this class would feel incredibly similar, at least thematically to White Mage pre-Glare & Dia. My guess is that Geomancer would use, Wind, Water, and Earth Magic to heal...as fire, lightning and ice make little sense as support spells and White Mage already encompasses these elements.

I'd prefer Chemist or Time Mage. My top pick is Chemist, but I'd be happy with Time Mage as well.