In theory, can't you just parse your accuracy on a given mob, then work out from there the amount you need to hit cap? Like say you are parsing 85% hit rate with 300 total acc in your tp set (for some lower level), then you can roughly estimate that you need about 20 more acc to hit the cap. You could probably get a decent estimate of your accuracy after 5 or 6 mobs. You don't really need to know the exact stats of a mob to get a general idea of where you stand.
____________________________Jacs of Leviathan
SAM, MNK, THF, NIN, SCH, DRK, BLU 90
Woodworking 100+3, Synergy 57