I don't have much experience critiquing music, but I like listening to this kind of stuff so why not.
The Book of Sorrow
I'm a headphone user, when this song started I thought my right earpiece died. (and i have a connection problem so I was busy fiddling with the jack) Then at 0:32 i was like, 'Whao!'
The panning is definitely way too intense for headphone users. Put on a pair and listen to it yourself, I'm sure you'll see what I mean.
Benevolence
I'm not sure if the title is matching - to me it feels like there's a lot of history in that song, and is meant to be used in an abandoned building that was once a major part of the protagonist's life. Or as an accompaniment to the prologue text (a la Final Fantasy I)
There are some strange bass notes, the lowest one, once at 0:28, a few times at 0:44 and the same sequence at 1:35 (an octave higher). I like the overall feel though. I might use this myself one day.
Clash on the Bridge
Same problem with the panning. Do a test listen with headphones.
Theres a sudden jump in volume with the pads (or whatever voice) panned to left in the beginning second. Once I noticed that the first time it became extremely distracting subsequent listens.
I find the silence in the melody at 0:37 0:39 0:42 really awkward. (same applies for the second verse.)
Eh? did it get suddenly louder at 1:04? or is my jack just acting up?
you NEED a bass line. Preferably introduced the second refrain and continued throughout all the repeats. A really, really, really funky one. There's no such thing as a battle song without a bass line. It just feels like something is missing. Something really, really important. And it has so much potential for a superfunky supergood bass line. I have a feeling I would love this song if it had a good bass line. So yeah. Bass it and I'd love to give it a re-listen.