Accuracy, how much?

First, what kind of accuracy cap are we dealing with? Is there a hard accuracy cap, like FFXI, where more accuracy simply does you no good, but you still can miss? Does Accuracy cap at 100%?

Does the level of the enemy matter greatly? Do I need more accuracy to hit something in coil than I do in AK?

Is there any way to know how these itemization points are worth. I have 410 accuracy (as a Paladin), but unlike say Warcraft, it doesn't tell me how accurate that is.

Yeah I'm a tank, but accuracy etc is usually semi-important for us too. Can't hold hate if you can't reliably hit (more crucial early in the fight/add pickup) than later on.

I have 501 Parry too and I know more of it makes me Parry more but it doesn't tell me how often I should expect to parry.

At the moment, if you are fighting anywhere except Coil, you will have 95% hit rate when you are completely naked against targets of equal level. You will only need 1-2 pieces of level-appropriate accuracy gear to reach 100% hit rate.

Coil requires between 460 and 470 accuracy to reach 100% hit rate for the whole dungeon. The requirement is lower on turn 1, but it ramps up as you go deeper.