I've come up with a BiS Crit build for my bard. It is as follows:

Elfin Bow
Bard's Chapeau
Bard's Shirt
Bard's Ringbands
Hero's Belt of Aiming
Allagan Trousers of Aiming
Allagan Sollerets of Aiming
Ultima Choker of Aiming
Hero's Earrings of Aiming
Inferno Bangle of Aiming
Allagan Ring of Aiming
Hero's Ring of Aiming
+Deviled Eggs HQ=

DEX 493
ACC 475
CRIT 590
DET 262
S.SPEED 352
VIT 387

Determination is a low in this build, but as bard relies on Crit for their Bloodletter Procs, I feel it is more important.