Total damage reduction:
We have 2× 1700 AR, 600 AR total on gear , 226% Luck for 84.75% increased HP and resist on Fauns gift , Permafrost , 150+ all resist and 60 shock resist. Also the shock 112 resist.
We also have Permafrost and Defiant to reduce damage. Defiant reduces damage by 15% and it scales between missing HP whilst the Permafrost has 20% MP Absorb for rescuing DMG by 20%.
Of course the Flawless victory will be used so they won't crit so easily.
Total AR= 1700+1700+600 = 4000. 4000×1.75 (75% increased AR Plagued) = 7000 AR.
Total Resist: 150+ All resist + 60 shock resist + 112 Shock Resist affix = 322 shock resist. 322×1.8475= 594.895 shock resist.
Total damage reduction overall.
Lets say someone dealt 10k damage to me.
Permafrost activates first for MP Absorb and reduces damage by 20% : 10000×0.8= 8000 damage.
AR Formula: 8000-(8000×7000÷(7000+20×1000)= 5,925.9259259259 damage. Now the damage is reduced to overall 41%
Resist Formula: 5,925.9259259259-(5,925.9259259259×594.895÷(594.895+20×100)= 4,567.3724184801 damage.
At this point , overall damage reduction is now 55%.
Defiant: 4,567.3724184801× 0.85 (reduce damage by 15%)= 3,882.2665557081 . Damage reduction overall is now 62% approximately.
This is why I seem to do very well in tanking hits in arena whilst being able to deal high hit frequency to win and the hunger + vault combo to blind and move fast to avoid CV. I can drastically reduce CV damage this way and make CV almost a non issue.
Im not gonna bother calculating damage reduced at low HP with using Defiant but 90% HP means from 15% to 28.5% damage reduced by Defiant set since it means 15%×1.9= 28.5% .