CC skills aren't just job exclusive, so you can't judge their usefulness just based on jobs. I used Physick on my MRD up until I unlocked WAR because it gave me a lot of solo survivability (and MO as a MRD isn't used for anything else while solo).

I've also MT'D dungeons as a LNC, DRD and PGL with Skull Sunder. Not useful past Toto-Rak, but enough to get us through after a tank leaves without wasting time waiting on another one.