I just remembered that Elemental Seal is /BLM usable at lvl 30, for certain situations you might want that over /BRD. /RDM gives you Fast Cast but imo its rather neglible compared to Elemental Seal, but it is still fine..Conserve MP is where it really takes the cake. However /RDM is good when you can sub it for Dispel for whatever reason you need it and theres no other Dispel out there.