Equip Power

Companion Bonuses are pretty much the only positive things in the game with items, Equip Bonuses and Sets. They give as much Combined Ratings as Item Level (which means your total percentages from stats remain unchanged) and they give percentage bonuses on top of that!

The Item Level and efficiency of your powers depend only on the quality of your companion with said power (contrarily to the Enhancement Power which only depends on your summoned companion). It is not affected by bolster, and most of the powers give a certain amount of stat percentages (some have different effects, like improving damage to a certain type of monster by up to 11% or dealing direct damage in certain conditions):

• Common: 5 Item Level, total stat bonuses : +0.05%

• Uncommon: 50 Item Level, total stat bonuses : +0.5%

• Rare: 150 Item Level, total stat bonuses : +1.5%

• Epic: 300 Item Level, total stat bonuses : +3%

• Legendary: 500 Item Level, total stat bonuses : +5%

• Mythic: 750 Item Level, total stat bonuses : +7.5%