RDM historically is not supposed to be the best at anything, but SE gave us the highest enfeebling/enhancing skill in the game. The problem is we're not even the best enhancer, we're actually the worst. And we are the best enfeebler except we aren't; at least only if a job as a whole can be defined as 'the best' solely by their merit abilities. Unlike WHM which gets the best cure spells without merits, RDM only gets the best enfeebles through merits which means all the other enfeebles are whored out to WHM and BLM and SCH. The only enfeeble RDM gets that no other job has is Gravity, which incidentally 90% of NMs are immune to. No other job relies so hard on merits as RDM does. It would be like if all mages had Cure IV and Cure V was a WHM merit spell that was only a little stronger than Cure IV.