Jobs marked with an asterisk(*) (Dancer, Thief, and Ninja) vary depending on main/sub it accompanies.
This list is incomplete, and may be incorrect.
Ninja
As a main job, your Fellow will use katanas, Ni Ninjutsu, and Mijin Gakure.
As a support job, your Fellow will use Ichi Ninjutsu. Utsusemi will still be 4 shadows even if Ichi is cast.
The following jobs will make your Fellow use Ninja: Thief, Samurai, Ninja.
Paladin
As a main job, your Fellow will use a sword and shield, use Shield Bash, buffs, Flash, and multiple Cure IV's once he or she gets too low. He or she will use Invincible when low HP.
As a support job, your Fellow will use spells up to what level he or she can.
The following jobs will make your Fellow use Paladin: Warrior, Paladin, Dancer.
Red Mage
If Red Mage is the main, your Fellow will be White Mage or Black Mage.
As a main job, your Fellow will use many enfeebles and several buffs. Chainspell is very hazardous as your Fellow seems to have limitless MP.
The fellow is immune to Sleep; and is immune or has strong resistance aganist silence.
As a support job, your Fellow will use spells up to what level he or she can.
The following jobs will make your Fellow use Red Mage (or WHM or BLM): Dancer, Red Mage, Ninja, Scholar, Thief, White Mage, and Black Mage.
Black Mage
As either a main or a support job, your Fellow will use elemental debuffs, area-effect nukes, and higher-tier spells.
The following jobs will make your Fellow use Black Mage: Ninja. If Red Mage is set in the complementing slot already, another Red Mage-inducing job can force Black Mage.
Beastmaster
As either a main or a support job, your Fellow will use a Crab pet and use that in battle against you.
The following jobs will make your Fellow use Beastmaster: Beastmaster, Summoner.
