City of Heroes/Enhancements

Types of Enhancements
There are five known types of enhancements in City of Heroes: Training Enhancements (TO), Dual Origin Enhancements (DO), Single Origin Enhancements (SO), Trial Reward Enhancements (TR), and Hamidon Enhancements (HO).

Enhancements are broken down into two categories: offensive and defensive. Offensive enhancements offer a greater bonus than defensive enhancements.

Effect of Level
The level of the enhancement does not directly affect the benefit that enhancement. However, the level of the enhancement relative to the level of the hero does. An enhancement that is one level higher than the hero using it has a +10% bonus to the enhancement's base bonus. A level below is -10%. This works up to three levels. Example: a level 35 enhancement used by a level 32 hero has a 42.9% bonus.

$$Total Bonus = Enhancement Bonus * 1 + ((Enhancement Level - Hero Level) * 10%)$$

When calculating the strenght of a power when it's enhanced, use the following formula for damage, defense, resistance, buff, or debuff type powers

$$Power Strength = Base Strength * (1 + (Total Bonus * Number Of Enhancements))$$

When calculating for a recharge, interruption reduction, or other similar power, use:

$$Recharge Time = Base Recharge Time \ (1 + (Total Bonus * Number Of Enhancements))$$

These formulas basically mean every recharge reduction SO slotted in a power reduces the power's recharge time by 25%.