Thanks for the replies, all. Here's what I did.

1.) I narrowed the latency problem down to one track that were causing about 60% of the problem. I went into the individual patches on those tracks and muted voices that were not critical to the mix, reducing the number of voices used for that patch from 3 to 2.

2.) Then, I staggered the tracks (shift clock) so that no two tracks triggered on the same tick of the beat, according to the strength of the attack for that patch.

Drums -- Bias = 0 (exact quantize)
Aux Percussion -- Bias = -1 tick
Bass -- Bias = +1 tick
Jazz Guitar -- Bias = -2 ticks
Steel Guitar -- Bias = +2 ticks (strong attack)
Pop Pad -- Bias = -4 ticks
Strings -- Bias = -6 ticks (slow attack)

That fixed the problem enough to where there was just BARELY a noticeable latency on the downbeat of 1. Joe Shmoe wouldn't notice...

Thanks alot for the advice!!

-Jer