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Avoidance encompasses the three game mechanics of Block, Evade, and Parry. If you Block, Evade, or Parry an attack, you take no damage from it. All 3 are rating based mechanics, and use the Critical Rating equation to calculate the percentage chance to avoid an attack. All 3 use the following formula to calculate this percentage:
- Avoid % = Avoid Rating / ((1190 / 3) * Your Level + Avoid Rating)
As with Critical Rating, you can reverse the formula to work out the rating you need to achieve a certain percentage:
- Avoid Rating = ((1190 / 3) * Your Level * %) / (1 - %)
Note: the percentage chance to Block, Evade or Parry an attack due to your Block, Evade or Parry rating is 15% for each. Effects such as the Guardian skill Pledge which add a percentage to Block, Evade or Parry can break the cap.
- Block rating = Might * 3
- Evade rating = Agility * 3
As well as completely avoiding an attack, you can also partially avoid an attack. When this happens, you may still take some damage, but less than if you had been hit normally. Partial avoidance is similar to Devastating Critical and uses the same formula to work out your chance to partially avoid an attack:
- Partial Avoid % = Avoid Rating / (1330 * Your Level + Avoid Rating)
To work out the avoidance rating required to reach a certain partial avoidance percentage, use this formula:
- Avoid Rating = (1330 * Enemy's Level * %) / (1 - %)
Note: as with Devastating Critical, the chance to partially avoid an attack caps at 10%.
Partial Avoidance Mitigation
This determines how much of the damage you avoid when you partially avoid an attack. The amount taken depends on the way you partially avoided the attack (whether it was a partial Block, Evade or Parry) and the damage type (Common, Fire, Frost, Lightning, or Acid). You can also improve your partial avoidance mitigation with gear, mainly as bonuses on Relics.
- % Damage Avoided = (20% + (Avoid %) + (Damage type Mitigation %) + (Gear bonus %))
It is possible to increase your partial avoidance mitigation to 100%. In which case when you partially avoid an attack, you take no damage at all, just as if you had avoided it normally.