Umm, Im having some trouble beating Cindy mindy and sandy. Im a level 52. Should I use a special attack or something?

i would suggest having as many HP gaining accesories on as you can. and make use of the special dresspheres.

and a white mage to cast Curaga over and over is pretty much essential too.

Yes, the attack where you read the thread two threads below the one you just stated (Thread 47797).