Well I think an independent study of dex and parry would be required to draw a legitimate theory as parry could be capped under certian dex ranges. So it would be a two person event. So a War and or Mrd with a healer against lets say a ogre at Mor Dhona. There would need to be a control (Gathering gear) and then replace with dd crafted gear as it does not have parry. But the problem with this is you would have to still need to get a huge pool of dex to work with. So the 30 stat points would have to be on the table as well and then reset to do parry (or parry done first then dex so only on reset is required ). And even then we would need a large number of trials and I am not sure how many auto attacks would occur before an ogre falls over but it would have to be a joint raw data session possibly between servers to get the best results to give a base of numbers our local mathmaticians can work with so we can get a definate equation hammered out.