I only have 3 shard slots. And the enemies are gone its just the boss himself. No matter how much shit i put into him he walks around and heals. I guess I'll just grind and lvl up before I attempt to face him again.
it probably has something to do with your strategy, then. the game has a pretty dramatic learning curve, but once you really get the hang of it you'll very rarely find any battle is impossible. i'd suggest just going to the arena and screwing around for a while there until the game starts making sense to you. specifically, you'll want to learn how to effectively perform a tri-attack, since that's literally what you'll do in every battle for the rest of the entire game. the game does a pretty poor job of making that clear, and a friend of mine who played it had more or less the same problem.
not a lot of people really agree with me, but i think resonance of fate is a pretty fun game when you really get into it. nothing is brilliant, or really that singularly worthwhile about it all, but it goes pretty far out of its way to be different from games of this nature. it's a strange experience.