Yes. Lemme give an example of what I already know.
Let's add Fauns Gift , Plagued, all shock resist on armour , Vampiric Touch , Battle mage and Defiant.
Also Shieldwall /skullshield or a bit of both in wizard class. Maybe let's also add equivalence too.
This isn't the most realistic scenario but it's just one example I'd give.
A typical player may add crystal armour which is around 1700 AR.
Shock resist on all gear including pet and trophy is about 60 shock resist.
Since we have battle mage, this armour will get multiplied by 60% and plagued will multiply this by 75%. This at (3) in PvP.
1700×1.6= 2720. 2720×1.75= 4,760 AR final.
Now let's calculate: Say a player deals 10k damage as an example.
10000-(10000×4760÷(4760+20×1000)= 8,077.5444264943 . This alone was 25% reduced damage. Of course 20% AR Piercing can affect it but it's still good with or without. The +20 is the enemy level and since the enemy level is 20 in PvP, that's why it's +20 for both formulas.
Now for the shock resists. 60 shock resist. Then Fauns Gift and CV (Cerebral Vortex) buffs this . It hurts all resists but this includes the shock resist anyway and since players of shock element will attack, this will be a substantial difference.
Both increase resists by 12.5% per rank. This is 37.5% at (3). While I'm not really an expert at this and I may not even be correct since if it increases all resist, would that make shock buffed too. I think yes.
Now let's also include the crystal affix which would give 150 all resist in PvP..
60+150= 210 shock resist. The rest of the resists will be 150 but we will be focusing on shock.
210×1.375= 288.75 shock resist. 288.75 × 1.375= 397.03125 shock resist. (gains gift and CV)
Now there are other variables but let's just count 397.03125 shock resist.
8,077.5444264943 is a reduced value of the initial 10k attack but it's now gonna be reduced by resists. Weaken can reduce the effect but it's still happening.
8,077.5444264943-(8,077.5444264943×397.03125÷(397.03125+20×100) = 6,739.6237963058 damage.
Now it's almost 40% damage reduced after armour and resist calculation.This is 33% damage reduced.
Defiant: 6,739.6237963058× 0.85 (reduce by 15%)= 5,728.6802268599 . The damage is reduced by 15% but I decided to use 0.85 because it's a shorter way of calculating 15% reduction.
Total damage reduced now is just over 40% now. Around 43% damage reduced from the initial 10k damage.
Shieldwall (conditional damage reduction since it's not permanent.
5,728.6802268599×0.6 (reduce by 40%)= 3,437.208136116 damage.
Now this 10k has reduced to 3.4k now which is basically 67% damage reduced.
Equivalence (only triggered a few times , maybe just once at full HP and this attack happened on full HP).
Equivalence says it reduces damage by 60% but I think it's actually 50%.
3,437.208136116×0.5= 1,718.604068058 damage.
10k into 1.7k. Around 83% damage reduction. It's temporary as the total permanent damage reduction is actually 43% and even more when defiant at low HP. maybe a bit less due to ar pierce or weaken sometimes.
If skullshield worked with Shieldwall and this is basically 10% damage reduction per skull so 30% total.
1,718.604068058×0.7 (30% reduction) = 1,203.0228476406.
Finally this damage has been reduced to almost 90%, albeit it's not permanent damage reduction but 43% average damage reduction in this example.