People have cleared some of the hardest fights on controller. Controller just like mouse and keyboard she will have to find a set up that works the best for her. Dancer isn't that bad when it comes to swapping hotbars. Now I personally don't use the W cross hotbar due to how it feels weird to use. For me the worst jobs is Paladin and Dragoon. I would also say ninja, but I put all of my ninjitsu on the hotbars that make use of needing to use both L2+R2 as either a hold or a toggle. Targeting for me I find is a bit harder.