TBH....in my mind, in FF11 SE told me RDM was a Magic-sword master, so I started playing RDM with this wrong idea and eventually realised...^^;

RDM was ( 2/3(WHM&BLM) + 1/3GLA) , he uses the EN-series magic sword on himself and buff single party member, debuff single enemy.
There were a lot of buffs for yourself and usually the first buff would expire and go off right after you had just casted the last buff on yourself.
There were a lot of debuffs for single enemy and usually the trash mobs would have died before you had casted the last debuff, and the bosses would resist most of the debuffs.
RDM was a no one wanted member until he got Refresh (single member MP regen), then every RDM complained they had became a refresh machine.