Fleeting Expertise

 increases Power Efficiency but reduces Power Duration.

Tips

 * Benefits powers that are not affected by duration the most. Thus, it is recommended to only equip this mod on frames that do not rely on Power Duration that much such as Mag and Nova.
 * Maxing this on Nova will cause Null Star to only spawn 2 particles.
 * In Theory, equipping a maxed out Streamline with maxed out Fleeting Expertise would result with a 90% power activation reduction, making a 100 energy ability cost 10 energy. ( Still under testing, Works with; Nekros )