Stat Weights

[Dyne_Fellpool]

SirTaint, in your example the actual parry rate is just as likely to be above the expected 20% than below it.
Yes a larger sample size will see the parry rate come closer to the expected amount, but that is not inherently a more favorable number.

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.

MythToken got it right.