I don't know if these are the official song names or if they're just named in here, but I found a few mistakes (at least I believe they are, please correct me if I'm wrong):
"Song of Persephone" is actually Pandora's song (I've seen on YouTube written as "Melody of Pandora", but honestly I have no idea if this is the real name or not
"The Muse's Song" is already included in GoW 3's OST, just like "Hades Theme" (named "Anthem Of The Dead")
"The Power of Helios" is listed twice, with the first being (I haven't confirmed) Helios's 'boss fight' (the light scene), and the second being (also haven't confirmed) the fight before actually facing Helios (the one where you climb a ciclope to destoy the enemies). Maybe these should have different names, I think
I haven't listened a lot but for now that's what I found, hope it helps and sorry if it doesn't
