As the title asks, I was wondering if anyone had some insight into what ballpark figures you need in AC to be unhittable aside from grazing hits and Natural 20's.

What I would love to see is a list that shows each level, on normal, hard, and elite, that a ballpark AC of a certain value is usually enough.

If no one has a decent list like that, just some generic numbers for various level ranges would be great for the 3 difficulties =)

I would just like a guide to know for a couple of my characters apx. when I should expect to give up on AC (I found 12 to be about right on my cleric), and also to see if my current plan for a Dwarf Stalwart Defender Fighter would be possible to have a near-unhittable AC all the way until endgame (where I hear its almost impossible to get enough AC).

Thanks!