I use /WHM and cure/status cure plenty (on fights like Proto-Ultima), as my RDM is 16, but I don't really need an MP build to do that. There's some small benefit to starting out with more MP, but as with any other job, it's really more about how fast you're getting it back. I have more than enough MP with /WHM, full MP merits, and whatever any gear might happen to have. I do idle in a few +MP pieces.
I've never really thought of QD damage and /WHM support as an either/or thing. If I'm only doing QD damage to something, then there's no point in my using a DD sub, so I'd better be using /WHM and helping out too. Plenty of time for both, and even once /RDM is leveled, I can't think of many fights where I'd sacrifice the greater utility of /WHM for a few more damage.
XI Wiki


