He'll need no accuracy at all. None.
I'm not trolling, the accuracy cap is 100% and its super easy to hit. I've been parsing all of my endgame content, and the basic af is enough to cap your accuracy at this stage. I suspect the algorithm is either bugged, or will be changed to make accuracy harder to cap. For now, it's not even a stat I look at in the slightest when gearing up.
On of the most interesting things I learned from parsing is how much dmg comes from basic attacks. For many jobs it's where MOST of their dmg comes from, and for Bard, it's usually second only to Heavy Shot. Edited, Sep 6th 2013 8:27am by Louiscool