Analyzing the Avoidance Changes for 4.2.
So this question has been bothering me: what difference does the changes to avoidance in 4.2 make? Does it buff Plate Tanks, nerf them (if only by a little bit). This is more curiosity than true need, but I figured it would be interesting to look at it.
Here are the proposed changes:
What we know:
- Death knights, paladins, and warriors no longer receive any bonus to their chance to dodge from Agility. Their base chance to dodge is now a fixed 5%.
- Death knights, paladins, and warriors now receive 27% of their Strength bonuses as parry rating, up from 25%. This conversion still only applies to Strength above and beyond their base Strength.
- %Chance to dodge conversion from agility: 430.69 agility = 1% chance to dodge
- Dodge Rating conversion to Dodge Chance: 176.7189 = 1% chance to dodge.
- Parry Rating conversion to Parry Chance: 176.7189 = 1% chance to parry.
- Parry Rating conversion from Strength: Strength/4 = additional Parry Rating
- Any buff that effects Agility and Strength adds chance to dodge and parry, respectively.
- Dodge and Parry caps for diminishing returns are both 65.631440%. This is with 0% base dodge and parry.
- Dodge from Gear-Agility (enchants and stats) is subject to diminishing returns, while base agility, is not.
- Parry Rating received from Strength is subject to Diminishing returns.
- Diminishing returns equation: 1/x' = 1/c + k/x where x is the stat's %chance, k is a coefficient (static for all plate tank classes at .9560), c is the cap for x, and x' is the new %chance.
- For consistency, if the DR formula spits out an x' that's greater than x, we'll keep it as the minimum amount. This will probably happen with Dodge rating, and Agility, since we're dealing with rather low numbers.
- Base Dodge is 3.758% and Base Parry is 5%.
- Base Dodge is further increased by Base agility (any source for this? Paper doll says it is, but is it?). This makes it about 4.035%.
Source for numbers and DR equation: http://elitistjerks.com/f15/t29453-c..._85_cataclysm/
- In 4.2, there is no dodge conversion from agility, and strength adds 27% instead of 25% parry rating.
- There is now a Stamina/Dodge rating leg enchant.
- Base Dodge is now a fixed 5%. (ty Wartotem)
Calculations based on my character:
This is my warrior: http://us.battle.net/wow/en/characte...deese/advanced. Play nice.
He currently has:
Agility: 174 (119 base + 55 from leg enchant)
Dodge Rating: 1282
Parry Rating: 1757
According to the equations above, he should be receiving 866 Parry rating from Strength, which is 4.900% chance to parry before diminishing returns. He also should be receiving .128% chance to dodge from gear-agility, before diminishing returns. That is a total of 5.304% avoidance from Primary Stats, once again, before diminishing returns.
Kings and Battle shout increases my strength to 4213.6, rounded up to 4214, and my agility to 759.15, subtracting base agility of 119, makes it 640.15, rounded down to 640.
This means that raid buffed, I receive 1053 parry rating from Strength, which is 5.960% chance to parry before DRs and 1.486% chance to dodge before DRs.
Take DRs into account, and now I have 5.693% chance to parry and 1.486% chance to dodge. Add the 4.035% base dodge chance.
So currently, I receive 11.214% avoidance from my primary stats.
My character in 4.2:
Stats will change!
Dodge Rating: 1337 (cool!)
Parry Rating: 1826
Due to the changes in the patch, I will now receive 935 parry rating from Strength, which is approximately 5.291% parry chance before DRs.
Add buffs: 4214 strength means 1137 parry rating, approximately 6.434% parry chance before DRs. Post DRs, it's 6.104% parry chance.
But wait! There's more!
Don't forget that we also get the additional 55 dodge rating from the leg enchant. Translates to approximately .311% chance to dodge, which after DRs, is the same.
Edit: When I originally wrote this, I forgot about the added base dodge chance. Wartotem has corrected me, and in 4.2, my character now has 5% base dodge chance.
Edit: Fixed the total.
So, post patch, I receive a total of 11.415% avoidance next patch.
What this means:
Damn. I gotta stop making mistakes. Maybe I shouldn't do math. Who knows! This time was just a simple issue. When adding buffs in my 4.2 character, I forgot to use .27 as the coefficient for parry, and used .25. This little mistake is why we've been popping back and forth between a buff and a nerf. However, now I can say with 95% certainty (barring any other mistakes) that we have been buffed slightly.