Ive ran three dungeons today. And two of the dungeons I had two different Black Mages and the third one a tank...all with the same issue.
Now, I could care less about someone having to have the best equipment ever to get into a dungeon. Matter of fact, as a WHM, I find it more challenging having to pick up the slack in heals because of poor agro/dps tactics etc....its just more fun.
Both of the black mages had utterly no idea what to do...at lvl 37. All had lvl 13-24 armor (white)
I was curious about it and asked if they ran dungeons before Then the tank and two of the black mages told me they honestly had no idea what to really do because the tank spams his attacks when doing fates and I guess black mages has some kind of ice AOE they can spam in fates.
They told me they pretty much only do fates and when they want to learn the real mechanics of the game they do dungeons. Which is ok at this level but I hope they figure this out before they hit HMs.