Quote Originally Posted by Sakasa View Post
Yes and no. You see the test 3 and 4 are the only one you can see an effect via dex as parry is static.
Tests 2 and 5 also have identical parry.

The testing, whilst appreciated, is a little too limited in scope to draw a complete picture of how much Dex contributes.
Because of the major difference in Test #1's results and Test #2's results, we should be aware that low amounts of Dex will give you little or no benefit since it is overshadowed by the testing's margin for error.
That said, there appears to be a floor somewhere around the 215-225 mark where a noticeable benefit starts. And this appears to get noticeably stronger every 15-20 points of Dex.

Once you hit the ~220 Dex floor, assuming that adding ~40 points of Dex will give +2% parry chance is probably a decent (albeit very rough) conservative guideline.