Previous functionality and tooltip states that on Ebony chest piece
"When you damage or heal your target for more than 10% of your maximum hit points in a single blow, you gain 1% power for 10 seconds. (max 5 stacks).
As #noworries has stated in some of the Dev streams, numeric stats apply to Rating contributions and % based gains are applied to other, currently this % is either not applying or is being applied to Rating contributions.
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