Fleeting Expertise

Fleeting Expertise increases Ability Efficiency but reduces Ability Duration of Warframe abilities.
==Stats==
Rank	Ability Efficiency	Ability Duration	Cost
0 	+10% 	-10% 	6
1 	+20% 	-20% 	7
2 	+30% 	-30% 	8
3 	+40% 	-40% 	9
4 	+50% 	-50% 	10
5 	+60% 	-60% 	11
Energy Cost	Unranked(+10%)	Rank 1(+20%)	Rank 2(+30%)	Rank 3(+40%)	Rank 4(+50%)	Rank 5(+60%)
100 	90 	80 	70 	60 	50 	40
75 	67.5 	60 	52.5 	45 	37.5 	30
50 	45 	40 	35 	30 	25 	20
35 	31.5 	28 	24.5 	21 	17.5 	14
25 	22.5 	20 	17.5 	15 	12.5 	10
10 	9 	8 	7 	6 	5 	4
==Drop Locations==
==Notes==
*The cost of abilities or their drains can not be less than 25% of their original value. Because of this, Ability Efficiency has an indirect cap of +75%.
**This means that if combined with a maxed , any Fleeting Expertise rank above four lowers overall duration without increasing efficiency.
**If your total Duration is below 100%, the excess efficiency above 175% will still count towards abilities that drain energy over time.
**Efficiency is capped at +75%, however the cap is applied to the result; Therefore efficiency used to compute drain is not capped, although drain is capped.
*Abilities that drain energy over time (such as or ) will have varying benefits from this mod depending on the amount of Duration Mods you equip.
**Duration mods on these abilities affect the actual length of one second of energy drain.
==Tips==
*Benefits abilities that are not affected by duration the most. Thus, it is recommended to equip this mod on Warframes or builds that are not heavily reliant on Ability Duration (such as  or a -oriented build for ).
*A combination of  and  can almost completely negate the Ability Duration penalty of this mod.
**Also, if using a fully ranked , Ability Duration is only affected by a very small amount of 5%, versus a 2% affect of  and , but with the advantage of only costing one mod slot and using less mod space.
==Gallery==
FleetingExpertiseModOld.png|Old appearance
==Patch History==
==See Also==
*Orokin Derelict
*Ability Efficiency
*
*
*Maximized, maximum Warframe abilities calculations.
de:Flüchtige Expertise
es:Experiencia fugaz
fr:Expertise Éphémère
ru:Мимолётное Мастерство
Category:Mods
Category:Corrupted Mods
Category:Dual Stat Mods
Category:Warframe Mods
Category:Rare Mods
Category:Update 10
Category:Naramon Mods
uk:Мимовільна майстерність