Final Fantasy XIV Database - Ffxivpro.com

Personally I think it depends on how you play the job, with whether or not you want more job abilities for RDM.

I myself prefer to /NIN on RDM, to DD, campaign battle, tank stuff etc - job abilities from RDM main OR from NIN sub would be nice. At least, a job ability thats useful for RDM/NIN, I mean. >_> "Jack of all trades" Should have a little bit of mage and a little bit of DD + Tank in it, in my opinion.