01. Defensive Stats
The most important questions about stats are answered by Satrina in the post Frequently Asked Questions. To sum it up:
Defense is a skill that helps prevent physical damage, by reducing the chance to be hit or critically hit. It also increases block, dodge and parry. Each point of +defense skill adds 0.04% to the chance to be missed, block, dodge and parry. This means that +25 defense will grant you 1% miss, parry, dodge and block. Also check out Veneretio's post How good is Defense
- 540 defense = 5.6% reduction = the minimum to become crit immune against raid bosses (lvl 83)
- 535 defense = 5.4% reduction = the minimum to become crit immune against heroic bosses (lvl 82)
Dodge is the act of avoiding a melee attack, that would otherwise hit you. So if you dodge an attack, you take no damage. 39.35 dodge = 1% dodge (subject to diminishing returns).
Targets of melee attack can parry each incoming frontal attack. A successful parry nullifies the attack (so for the attacker it’s like a miss) and reduces the swing timer of the defender. 49.18 parry = 1% parry (subject to diminishing returns).
Block is the ability of a shield to absorb melee damage. If you block an attack, a fixed amount of damage is removed from the hit you take. 16.39 block = 1% block chance. Check out Satrina’s post on Blocking.
Avoidance vs. mitigation
Defense, dodge and parry are called avoidance stats, as you avoid the entire effect of the attack. Block is called mitigation, as you mitigate (lessen the effect) of the attack. So for example if you have 20% dodge, 20% parry and 20% block, you have 40% chance to take no damage and 20% to block some of the damage.
- 4.92 defense rating = 1 defense skill
- 39.35 dodge = 1% dodge
- 49.18 parry = 1% parry
- 16.39 block = 1% block chance
- 82 Resilience = 123 Defense Rating = 25 Defense Skill = 1% less chance of being crit
Keep in mind that every point in dodge or parry rating gives slightly less percentage than the previous point. This is called diminishing returns. For defense each point rating always equals the same amount of skill, but the amount of dodge and parry you gain from the defense skill does diminish. More information on the subject can be found in the post Diminishing Returns
After hitting crit immunity, aim for a defense:dodge ratio of 2:1. Parry is considered the least avoidance stat, as you need a lot to gain 1% parry and because the diminishing return on parry is very steep. More information on the subject can be found in the post Balancing Avoidance
More information can be found in the post Block cap + Pure avoidance macro’s . But to calculate your avoidance, run this script:
/script dr=function(x)return 1/(1/16+0.9560/x)end;DEFAULT_CHAT_FRAME:AddMessage("Need 102.4 combat table coverage. Currently at: "..string.format("%.2f", GetDodgeChance()+GetBlockChance()+GetParryChance() +5+dr(GetCombatRating(CR_DEFENSE_SKILL)/122.962)))
For more information on Combat Ratings, take a look at:
* Formulas and Relationships
* Wowwiki: Combat Rating