This isn't a fight game, I learned it the hard way. Just play it like Chess: think, move pieces just on by one, think ahead. Never move whole party close to each other, keep them well spread out and in best positions, so while one is chased the others can flank. Except the healer, if have to, go in and back to safety. Before fights examine enemies, know their weakness. And you may need to reload a save, try out a new way. Though only first time is really difficult, will be easy after learning it.