Mythstones are reduced by 70% in affixes so the affix in pvp is only 30% of what the value is in PvE. Do the math, 30% of 50% = 15%. 50*0.3= 15. It also tells you in arena rules that mythstones are reduced by 70% in value and you can check profile for what that mythstone value really is.
for example i have 10k basic armor. i have plague(75%) and 15%mythstone armors. then in calculation
10,000 * 1.75*1.15=20,125armor
is this right mr. @CuzegSpiked ?
Yes
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@lionex In a follow-up question from another thread, I will provide a simple analysis of PvP Resist vs Weaken affix.
Mathematically, Weaken affix gives a chance to reduce a players resist by XX%.
In the arena, player levels are 20. PvP Resist Damage Reduction calculated as;
Resist / (Resist + (20x100))
Leveraging damage reduction example from above, let’s theorize what weaken could do to a player with the resist in my prior example.
Defiant 1-0.25 = 0.75
25% damage reduction from defiant set,
Armor 1-(4400x1.75x1.6)/((4400x1.75x1.6)+(20x1000)) = 1-0.3812 = 0.6188
38.12% damage reduction from AR.
4400= 1700+1700+1000 (warrior gear)
1.75= Plagued at Rank 3 [1+25%x3 or 1.75]
1.60= Battle Mage at Rank 3 [1+20%x3 or 1.6]
Resist 1-(270x1.375)/((270x1.375)+(20x100)) = 1-0.1566 = 0.8434
15.66% damage reduction from resists
270= 170 + 100 (gear)
1.375 = Cerebral Vortex at rank 3 [1+12.5%x3 or 1.375]
Damage reduction Example:
1-(0.75x0.6188x0.8434) = ~ 61% Reduced Damage
Leveraging example from above, now Resist Vs 24% Weaken
270 x (1-0.24) = 205
(205x1.375)/((205x1.375)+2000) =
282/2282 = 0.124
1-0.124 = 0.876
Damage Reduction vs 24% Weaken
1-(0.75x0.6188x0.876) = ~ 59% Reduced Damage (Difference of 2% less damage reduction versus Someone using Weaken at 24%).
Vs 48% Weaken --> Caveat - I do not know if 48% Weaken is possible.
(270x(1-.48))/((270x(1-0.48)+(20x100)
140.4/2140.4 = 0.0656
1-0.0656 = 0.9344
1-(0.75x0.6188x0.9344) = ~ 56.6% Reduced Damage (Difference of 4.4%% less damage reduction versus Someone using Weaken at 48% ~ 3 affixes).
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it seems that WEAKEN(resist reduction) is the counter part of AR PIERCE(AR reduction). thanks @Mr_Scooty
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Well after some tinkering I’ve figured it out, just working on the healing bit now lol
You can do it.
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that’s amazing
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may I inquire as to your starting hp? I’ve found issues with managing upper damage reduction in addition to hp
It is a variant of my Black Magic Wizard.
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i thought my calculation of 95% reduction is great but then i see this posts 
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What’s the problem? 95% DR is already high enough.
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i tried my best calculating the highest damage reduction i could, but other still managed to get it higher it hurts my feelings 
I think the secret formula of reduction is alchemy with high armor/resist. No need to explain. You should try it and you will see the result.
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Thank you. 
Duly noted.
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but the secret formula is have another secret formula too. When you got the another secret formula. You will see the result.
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Wow that’s awesome damage reduction…can you give me some hints to do that? I still cant figure it out how does high damage reduction works.
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Im still way under the op mr scooty with his 18.5m damage prevented but I’m still working on it. I need to make a set with alchemy and see if that helps
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Good job @Spaggy 
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