I'm completely confused as to what would be better on body. At first I was going to go PIE, as I notice in my parse results that most of the damage I'm doing comes from light shot, so I figured it'd be better to go with pie, until I started talking with a ls mate who said that crit attack would be better.
I really have no idea how much weight should be given to crit attack, because for one, I have no idea what my crit rate is (I should probably pay more attention to my parser), and two I have no idea what that little number on the crit attack materia means. Does a +30 crit attack add 30 damage to all of your crits for example? I doubt its that simple...