I was looking around and what there was left to spend trophies on, depending on augments couldn't these make a good solo climactic + rudra's piece? Seems like I might be missing something as I've never seen this piece mentioned before :O
According to wiki they can be augmented with up to 3% critical hit damage, as well as some dex (with -str) and some att.
http://wiki.ffxiclopedia.org/wiki/Spry_Wristbands