I do suggest using FA, Pathoma, Sketchy during your regular classes as a SUPPLEMENT. For example, I would not use Pathoma as THE source of pathology knowledge. I would use Robbins or Golijan or whatever your school suggests. What I did for pathology was listen to that chapter in Pathoma first so that it was explained to me so I wasn't jumping into a pathology textbook without any background in the pathology, then I would read Robbins.
It all boils down to the fact that the more familiar you are with these resources going into board studying, the less you have to learn. For example, if you use Sketchy (which is hundreds of videos and would take you weeks to learn if you started in dedicated), then by the time you get to boards, you've already seen the videos and don't have to waste time memorizing pictures.
I also think Boards and Beyond is an awesome source for classes/boards.