#14 esto del hit se lleva discutiendo milenios, tienes un artículo en WoWwiki que lo explica a la perfección:
Hit refers to physical damage that occurs as a result of an attack made with melee or ranged weapons. The chance to hit increases by 1% per 32.79 hit rating points at level 80, 15.77 hit rating points at level 70, and 10 hit rating points at level 60. The base chance to miss with maximum weapon skill against an opponent of equal level is 5% for two handed and 24% for dual wield.
If the difference between the mob's Defense Skill and your Weapon Skill is less than or equal to 10, then the formula for calculating your base miss rate against that mob is:
* with two-hander: 5% + (Defense Skill - Weapon Skill)*.1%
* with dual-wielding: 24% + (Defense Skill - Weapon Skill)*.1%
If the difference between the mob's Defense Skill and your Weapon Skill is greater than 10, then the formula for calculating your base miss rate against that mob is:
* with two-hander: 7% + (Defense Skill - Weapon Skill - 10)*.4%
* with dual-wielding: 26% + (Defense Skill - Weapon Skill - 10)*.4%
Applying these formulas gives the following base miss rate for a Level 80 character with a 400 Weapon Skill:
* v. Level 80 mob: 5.0% / dual-wield: 24%
* v. Level 81 mob: 5.5% / dual-wield: 24.5%
* v. Level 82 mob: 6.0% / dual-wield: 25%
* v. Level 83 mob: 9.0% / dual-wield: 28%
* v. 32.79 hit rating reduces your chance to miss by 1%
In the context of stats, the term "cap" refers to the point at which equipping more of a particular stat will have no additional value. For hit rating the cap usually discussed is in regards to raid bosses. For example, once you reach or surpass the hit cap, you will never miss an attack against a raid boss unless you are under the effect of some debuff that reduces your hit chance (for example, Attumen the Huntsman's curse).
As shown above, your base chance to miss a raid boss while dual wielding is 28% with auto-attack on both hands. Your base chance to miss a special attack is 9%. For each 15.77 hit rating at level 70 or 32.79 hit rating at level 80, you reduce your chance to miss by 1%. Thus we can calculate hit caps for auto-attack and special attacks:
A "soft" cap is the point at which your yellow attacks will always hit and more hit rating has no affect on them. A "hard" cap is the point at which your autoattacks will always hit and more hit rating does absolutely nothing for you.
En resumidas cuentas, para 2H con 9% (295.11 hit rating) llegas al cap (raid boss), con dual necesitas 28% (918.12 hit rating) para blanco y 9% (295.11 hit rating) para especiales (raid boss). Para PvP necesitas únicamente 5% (163.95 hit rating) para 2h y specials y 24% (786.96 hit rating) para dual, aunque nunca está de más llevar algo más de hit en PvP ya que ciertas clases por talentos resisten stuns, silencios, etc... Obviamente es literalmente imposible llegar al cap en dual, pero con 15%~ vas más que sobrado, si gimpeas AP y Crit para intentar llegar lo más cerca del cap posible, llegará un momento que lo único que harás será bajar tu DPS.
PD: A los casters también les afecta el hit de specials únicamente, 9% PvE, 5% PvP.
