Most of the FP's can be done pretty quickly with a good group who knows what and where they are going. I think you can skip, like all of Traral V if you want. I've done runs where we only fought the last boss but I hear you can skip him too. Esseles hard mode can be quick and painless if everyone avoids Vokk's lightning bolt in the end. Although it was recently nerfed so a good healer maybe able to heal through it. But an any of the FP's can be done in 30 mins (good, experienced group) to a little over an hour (almost everything has gone wrong).