Rolling duplicates all the time is killing this game for me, seriously. Every time I get enough energy to roll for a new character, I just get a lame skill boost. It would make sense if I already had a lot of characters, but that's not even the case. I planned to spent money on this, but I'm not going to spend money only to feel instant frustration.
Just out of curiosity -- how far into the game are you, what chapter?