Dex/Parry tiers - definitive testing methodology needed

[Coramac]

Pretty messy dataset. Can dump linear regression on it based on deviation from minimum value,

f(x) = 0.400x + 24.01
r^2 = 0.357

I'm wondering if it's a linear increase in DPS relative. I noticed that my block strength with the same shield decreased as I leveled through Toto-Rak, which suggests to me that it might be all normalized by the base level value. If so, the 512 parry would suggest a 15.99% base parry rate with base dex and base parry. Just a hypothesis -- should be easy enough to test using a weathered axe and no +dex or +parry gear.

It's a step function so your linear regression isn't going to look good.