255 I think
Depends on the target Agility. If you Accuracy is greater than the target's Agility then you will always* land hits
*Unless there are other factors
Mobs in Crystal have a high agility stat? Quite regularly ill swing 3/4 times using fire thrust/flamesword/blaze and they won't register hits, yet using Tdb I'll hit every time. Don't know if anyone else has this experience?
Looks like you need more acc bud