Great back piece until you can get Astute Cape. Use this when you sing march and other buffs. Jesters +1 should be worn when singing debuffs. Like most gear options in the game, they are situaltional.
Singing +5 > wind +3 anytime, Astute cape still beats this in all situations. Otherwise stick with Jesters+1. 10CHR > 3wind for debuffing, and once you have astute you will need no other back piece for bard.