Enhancement Diversification, usually abbreviated ED, is a system of modifying the effects of enhancements when the total enhancement is above a certain percentage. Enhancement Diversification became effective on the production servers as of the release of Issue 6 and City of Villains.
Enhancement Diversification is based on a system of dimishing returns on enhancements slotted to raise bonuses to a very high level. It primarily affects Single-Origin Enhancements and Hamidon Enhancements, though it is possible that enough slotted Dual-Origin Enhancements may be affected as well.
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What Enhancement Types are what bonuses (schedules)? The percentages in parentheses represent Single, Dual, and Training Origin enhancements, respectively. The numbers also assume that the enhancement is equal to your own level. An enhancement that is one or two levels greater than your level will work a little better; one or two levels lower than yours will provide a little less than these percentages.
Schedule A Enhancements (33.33%, 16.66%, 8.35%) are:
- Accuracy, Confuse, Damage, Defense DeBuff, Drain Endurance, Endurance Discount, Fear, Fly, Heal, Hold, Immobilize, Intangible, Jump, Recharge, Recovery, Run, Sleep, Snare, Stun, Taunt, To Hit Debuff
These bonus types start to see reduction when the bonus is 70% or more, and a severe reduction at 100% bonus or greater. Specifically, if you put six even-level Single Origin enhancements in one power, they will enhance the power to the following degree: 33.33%, 33.33%, 28.33%, 4.99%, 4.99%, 4.99%. Clearly, it is inefficient to put more than three Single Origin Schedule A enhancements in one power.
Schedule B Enhancements (20%, 10%, 5%) are:
- Range, Defense Buff, Resist Damage, To Hit Buff
These bonus types start to see reduction when the bonus is 40% or more, and a severe reduction at 60% bonus or greater.
Schedule C Enhancements (40%, 20%, 10%) are:
This bonus type starts to see reduction when the bonus is 80% or more, and a severe reduction at 120% bonus or greater.
Schedule D Enhancements (60%, 30%, 15%) are:
This bonus type starts to see reduction when the bonus is 120% or more, and a severe reduction at 180% bonus or greater