Talk:Fleeting Expertise/@comment-94.139.5.177-20190722074711/@comment-114.43.213.147-20190812150325

You're technically not wrong if you were to use Fleeting Expertise as the only mod to try to decrease the energy drain. In most cases though, you'll use duration mods as well, which can drastically lower the drain.

I tried various mod combination to lower the energy drain of channeling abilities, with and w/o Fleeting Expertise. W/o Fleeting, you'll need 130 efficency and 282 duration to hit the drain cap using Streamline, Narrow Minded, Primed Continuity, and Constituion (all maxed). W/ Fleeting, you only need Fleeting Expertise and Streamline (both maxed). For some reason, the drain from channeling abilities is NOT affected by the efficency cap of 175, which means that you can easily overshadow the drain increase from the duration loss. You can easily test this yourself by having a rank 4/5 Fleeting Expertise and alternate between a rank 4 and a rank 5 Streamline.

It is up to you to decide whether the duration loss from Fleeting is worth it to cap out efficency, especially for frames with abilities that you need to keep up like Mesa's Shatter Shield. But if you're planning to only use the channeled ability, it's better to use maxed Fleeting + Streamline, as it opens 2 more mod space for other mods.