Streamline

Streamline increases the Ability Efficiency of Warframe abilities.

Stats

Energy Cost	Unranked	Rank 1	Rank 2	Rank 3	Rank 4	Rank 5
100 Power	95	90	85	80	75	70
75 Power	71.25	67.5	63.75	60	56.25	52.5
50 Power	47.5	45	42.5	40	37.5	35
35 Power	33.25	31.5	29.75	28	26.25	24.5
25 Power	23.75	22.5	21.25	20	18.75	17.5
10 Power	9.5	9	8.5	8	7.5	7
5 Power	4.75	4.5	4.25	4	3.75	3.5

Update 8.2 changed Streamline mechanics to be a linear reduction in cost.
It is possible to hit the hardcap of 175% Ability Efficiency thanks to Fleeting Expertise. All Ability Efficiency added beyond 175% is not represented on the UI, though may benefit channeled abiliites if your duration is below 100%.
As this is a Ability Efficiency mod, it will not lower melee channeling costs.
There is an unreleased Primed version that increases Ability Efficiency up to 55%.

Warframe Mods
Madurai	Blind Rage • Continuity (Primed) • Energy Conversion • Firewalker • Hunter Adrenaline • Intensify • Lightning Dash • Provoked • Rage • Rending Turn • Transient Fortitude
Vazarin	Adaptation • Antitoxin • Armored Agility • Augur Accord • Aviator • Battering Maneuver • Diamond Skin • Fast Deflection • Flame Repellent • Gladiator Aegis • Gladiator Finesse • Gladiator Resolve • Health Conversion • Ice Spring • Insulation • Lightning Rod • Narrow Minded • Overextended • Quick Thinking • Rapid Resilience • Redirection • Reflection • Reflex Guard • Retribution • Rolling Guard • Shock Absorbers • Steel Fiber • Sure Footed (Primed) • Undying Will • Vigilante Vigor • Vigor (Primed) • Vitality • Warm Coat
Naramon	Augur Message • Augur Reach • Augur Secrets • Constitution • Enemy Sense • Equilibrium • Fleeting Expertise • Flow (Primed) • Fortitude • Handspring • Heavy Impact • Intruder • Maglev • Master Thief • Mobilize • Natural Talent • Patagium • Piercing Step • Rush • Streamline • Stretch • Thief's Wit • Toxic Flight • Vigilante Pursuit • Vigorous Swap
Umbra	Umbral Fiber • Umbral Intensify • Umbral Vitality