Talk:Ember/@comment-2A02:8108:1840:3608:4543:7633:C1A9:C4C-20191005143615/@comment-25254386-20191006013712

Well first off, there is no "max efficiency". There is no weird substitution with the duration or anything. Secondly, the "minimum value" is not limited to just channeled abilities. All abilities have a energy cost cap of 25% their original value.

E.g. with and  Ember has an efficiency of 190% (though the arsenal only shows 175%). As such, a drain of 3s-1 should go down to $3 (2 - 190%)$. But because energy drains are also affected by duration you'll actually see $3 (2 - 190%) / 40%$. If you're observant, you'll see that this is also already 25% of the original value, 3. So, no matter how much extra duration you add to offset Fleeting's effects you're value can't go down anymore since it's already at the 25% limit.