Stat Weights

[Giantbane]

No not really, you parry the same % no matter how many mobs are hitting you. The effects just seem more noticeable because in that short time frame you are incurring more attacks.

Parry is as good against 10 mobs as it is against 1 mob. It mitigates the same %.

Higher mitigation when 10 things are hitting you at once is def more helpful. But again parry's usefullness is still exactly the same, because you parry for the exact same %.

If your defense rose by 10 you would not claim that to be more useful on 10 mobs than on 1 mob. It still mitigates the same %.

The fact is that more mitigation parry or otherwise is very good for keeping you alive during 10 mob attack,due to the damage you are sustaining in a short time frame and the risk of death.
But the parry stat is not suddenly more or less useful in and of itself.

The larger the data sample the more accurate the percentage.

If you have 20% parry rate with one mob hitting you over the course of a minute the RNG will have a broad range.

If you have 10 mobs hitting you the range will be more narrow and closer to the 20% mark.

The more predictable parry is the more useful it is since it's biggest flaw is how unreliable it is.

(This still doesn't make it good but outlines why it is more useful during a duration with more mobs)

^ this

It's not about the %, it's about the reliability of it. When you're getting hit a lot, you can rely on it to mitigate a roughly consistent amount of damage most of the time. If you don't get hit very often, its performance can vary wildly. This means in a low frequency setting against 1 mob, you and your healers can't rely on it and will have to heal/use cooldowns with the expectation that you won't parry those big hits where it matters.