Yes, I got the evidence and took it to the council. That's how I got in to Pyrog's cave and got the crystal soul there and returned it. I've also already found the crystal soul from Akhronath (west of Fort Remote). But I'm sure I'm missing a step somewhere. I have the vague idea that the last crystal soul is north of Erika's tower, but I'm not sure how to get there or even if I'm right (I can get to Erika's tower, I mean, just not north of it; you get stopped by the sight of thousands of Empire troops and back off). There aren't many places left I haven't searched pretty thoroughly.
Edit: Oops, I missed where you said to search north of Mancuso. Thanks, I don't think I've done that yet!
Another Edit: Hmm, I can't get in to the bandits' place either. I'm definitely missing something here. Isn't there a key I'm supposed to find in Avit? Or someone I need to talk to? Man, why didn't I keep notes last time I played?