Bushido using lightning strike adds a really nice bonus to damage, howver if you are killing things that fast that its dead before even the peace timer wears out then you'll never get to max perfection to see the real benefits.
Since you've already eaten the music scroll, disco really is an AWESOME addition to that, particularly since it requires no change in stats yet provides wicked benefits. You will hit for more damage (at 120 disco/music a non-160 barding dif mob looses 28% of its resists across the board), you will hit more often because the skills of said mob also lose 28% (so if it had 100 wrestling, now its 72), and the barding difficulty will fall so its easier to peace.
On a side note, if you are fighting things that die before the timer runs out, it may be time to perhaps try something a bit harder. Disco first, then peace.
As for anatomy vs swords/jacking.......i think the bonus for Gm anat is 55% while the modifer for jacking is 30%....anat.
I would---drop peace, add 120 disco and 100 anat.
