Talk:Chroma/@comment-73.52.140.222-20190312200101/@comment-216.15.0.192-20190602131820

You can sort of go beyond maximum efficiency, actually. For any ability with energy drain per second, there is a relationship between duration and efficiency that is used to determine the drain rate which DOES factor in efficiency above 75%, even though the maximum you can reduce drain rate TO is only 25%.

This is relevant because Fleeting Expertise reduces duration to 40%, BUT 190% efficiency + 40% duration = 175% efficiency AND 175% drain rate efficiency, because it takes 190% efficiency to offset having -60% duration for drain abilities.

This only changes anything if you further reduce your duration, but it's worth knowing. There's a table that goes into more detail somewhere on the wiki.