But as for Bard we're not sure, and that leaves out MRD and ARC.
You can expect a Bloodbath at SE if they try and put a Harp in my MRDs hands.
They have stated there hasn't been an official name for MRD and ARC yet, but not to worry.
Long before the names of jobs were announced, it has been discussed in the ARC forums that BRD may be connected to ARC somehow.

All I know is I would love a Dark Knight and it better have more MP then my MRD