Melee Power

Overview
This attribute introduced in Update 23 is similar in effect to Spell Power, and increases straight weapon damage in addition to certain static effects from enhancements. Melee Power is gained from certain enhancements, some melee Epic Destinies, some feats, and future loot. This rating increases melee attacks by the following formula: (100+Rating)/100; x percentage increase. Example, A character with 20 melee power that does 50 damage with a weapon will do a total of 60 damage. Melee Power is applied to Sneak Attack damage.

Formula for negative power: 100 / (100 - Power).
 * -50 Melee Power means you deal 100 / (100 - -50) = 100 / (100+50) = 100/150, or 2/3rd, or 66% damage
 * -100 Melee Power means you deal half damage, etc.

Maximum theoretical Melee Power (U27):

Feats

 * Epic Power (granted for each epic level): +3
 * Fighting styles: up to +6 Combat Style bonus
 * Shield Mastery: +3
 * Improved Shield Mastery: +3
 * Single Weapon Fighting: +2
 * Improved Single Weapon Fighting: +2
 * Greater Single Weapon Fighting: +2
 * Two Handed Fighting: +2
 * Improved Two Handed Fighting: +2
 * Greater Two Handed Fighting: +2
 * Greater Rage +10 when Raging
 * Weapon Focus: Bludgeoning/Piercing/Slashing: +2
 * Greater Weapon Focus: Bludgeoning/Piercing/Slashing: +2
 * Superior Weapon Focus: Bludgeoning/Piercing/Slashing: +2
 * Weapon Specialization: Bludgeoning/Piercing/Slashing: +2
 * Greater Weapon Specialization: Bludgeoning/Piercing/Slashing: +2

Passive

 * Assassin
 * Deadly Shadow: +10
 * Harper Agent
 * Versatile Adept I-III: +[1/2/3]
 * Versatile Adept IV: +[2/4/6]
 * Knight of the Chalice
 * Censure Outsiders: +5
 * Champion of Good: +10
 * Vanguard
 * Armored Strength: +10
 * Frenzied Berserker
 * Frenzy: +5
 * Death Frenzy: +10
 * Storm's Eye: +10

Active/Situational

 * Assassin
 * Damage Boost: +[10/20/30] for 20 seconds
 * Measure the Foe: +6 per second stealthed, stacks 5 times
 * Knight of the Chalice
 * Empowered Smite: +5 for 10 seconds after using Smite
 * Melee/Ranged Power Boost: +[10/20/30] for 20 seconds
 * Vanguard
 * Action Boost: Melee Power: +[10/20/30] for 20 seconds
 * Follow Up: +[3/6/9] for 12 seconds after using Stunning Shield
 * Frenzied Berserker
 * Raging Blows: +5 while raging
 * Ravager
 * Melee/Ranged Power Boost: +[10/20/30] for 20 seconds
 * Dismember: +5 for 10 seconds after using Cruel Cut
 * Laughter: +10 for 15 seconds after scoring critical hit with Slaughter

Epic Destinies

 * Innate abilities
 * +2 per innate ability: Divine Crusader
 * +3 per innate ability: Fury of the Wild and Legendary Dreadnought
 * +4 per innate ability: Fatesinger, Grandmaster of Flowers, Primal Avatar, Shadowdancer, and Unyielding Sentinel
 * Master's Blitz: +7, stacks 10 times
 * No Regret: +2
 * Castigation: +2
 * Aura of Purification: +2
 * No Remorse: +2
 * Zeal of the Righteous: +50

Special attacks affected by Melee Power
Some special attacks benefit from Melee Power.
 * Sneak attack 150%
 * Assassin
 * Venomed Blades 200%
 * Shadow Dagger 200%
 * Drow
 * Venomed Blades 200%
 * Knight of the Chalice
 * Light damage from core enhancements
 * Divine Light 200%
 * Divine Sacrifice
 * Vanguard
 * Shield Riposte