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How to Get Fleeting Expertise in Warframe (2026): Where It Drops, Stats and Is It Worth It
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How to Get Fleeting Expertise in Warframe (2026): Where It Drops, Stats and Is It Worth It
Increases Ability Efficiency by 60% and reduces Ability Duration by 60% of Warframe abilities
Last Updated on September 18, 2026
The short answer
Fleeting Expertise is a rare warframe mod: Increases Ability Efficiency by 60% and reduces Ability Duration by 60% of Warframe abilities. The fastest way to get it is from Derelict Vaults. Efficiency for spam casters; rank 4 with Streamline hits the cap.
Reviewed September 13, 2026, current through Update 43.5. Stats are max rank from the live game data, drop chances from the official drop tables; this page is re-checked after every major patch.
| Mod facts | |
|---|---|
| Slot | Warframe |
| Rarity | Rare |
| Polarity | Naramon (dash) |
| Drain at max rank | 11 (rank 5) |
| At max rank | +60% Ability Efficiency; -60% Ability Duration |
| Fastest route | The fastest way to get it is from Derelict Vaults. |
Table of Contents
The card
Tap it to unfold the full card at max rank.
11
Fleeting Expertise
Fleeting Expertise
+60% Ability Efficiency
-60% Ability Duration
WARFRAME
Where it drops
Official drop table, best chance first.
| Where | Chance | Rarity |
|---|---|---|
| Derelict Vault | 4.17% | Rare |
Tips that save runs
- Mag for abilities not affected by duration
- Nekros for Desecrate-oriented builds
- Streamline for maximum efficiency
- Ability Efficiency has an indirect cap of +75%.
- If combined with a maxed Streamline, any Fleeting Expertise rank above four lowers overall duration without increasing efficiency.
Mistakes that waste runs
- Equipping it on builds heavily reliant on Ability Duration.
- Using ranks above four with a maxed Streamline, as it only reduces duration further.
- Believing efficiency above 175% is always wasted, as it still counts for draining abilities if total duration is below 100%.