RDM = Red Mage. Coolest jobs ever. could do it all. given that there is not much of a support roll in A Realm Reborn, this could be Great example of a Thaumaturge having choice of Black mage or a Healing type with a chance to cast "Haste" maybe Haste can be more Limit Break Level 1 based or require a huge MP dump in order to not make it too over powered. or perhaps limiting it to only 1 party member may have haste at a time. If that is unrealistic towards game engine then maybe "Haste" can affect the rate in which the Limit Break fills up.

SAM = Samurai would be a TP machine like in FFXI and would probably be best suited as an option from Lancer. However given the idea of making a non DPS class maybe this could be a Parry intense tank with great magic resist(basing it off of the Blade would be extremely cool. perhaps like binding a soulstone to become a job, you could have Samurai bind a Magic Resist to their blade.