What I want:

Swordman (class) > Samurai (job): Tank focused on countering damage and transforming damage received into mitigation.
Conjurer (class) > Blue Mage (job): Branching from Conjurer, a healer class focused on AoE debuffs to monsters to diminish damage, transforming big hits into manageable damage, and quick AoE, low potency mitigation and healing spells (like Big Guard and White Wind).