Quote Originally Posted by Dejnov View Post
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I could end up just hanging onto soul points/holy soul points, but I've no idea if we get something else to spend them on later in the game.--
The "which Soul should I use?" thread should answer that.

There's no reason to hold on to SP or HSP. You're going to want Mordred, Joan and Dartagnan for EX skill versatility. After that, you can get whatever you want. Or, just get what you need for GO missions.