Nah RDM lore in all the games were a highly diversified class that wielded roughly 3/4th - 4/5ths the power of normal classes but had the ability to use participate in combat and use both schools of magic. FFXI's RDM however went through a series of changes in the early pre-RotZ age, and was eventually rebuilt with it's core purpose as an enfeebler when advanced jobs were first introduced. Unfortunately FFXI's evolution has not been kind to RDM and much of that versatility went underutilized and became underpowered as updates for RDM stagnated.