Mass Effect 2 Power Durations and Cooldowns

Mass Effect 2 Powers Analysis

The table below lists power durations and power cooldowns.
In Mass Effect 2, Cooldowns affect ALL powers you have -- that is, you cannot use another power until the cooldown has finished. Therefore,

• If you are trying to set up a combo, you need to look at whether the power duration will expire before your power cooldown is complete so that you can throw out another power.
• Example: Pull 1 has a Cooldown of 3.00 and a Duration of 5.00. Therefore, you have a 2.00 second window to use another power, such as Charge or Warp (plus the time it takes for the effect to reach the target).
• Example: Adrenaline Rush 1 has a Cooldown of 5.00 seconds and a Duration of 5.00 seconds. You can therefore be constantly under Adrenaline Rush.
• Note that some powers have a cooldown that only starts AFTER the power has expired (e.g., Tactical Cloak, Shadow Strike).
• If you are using powers, a longer cooldown means you are less likely to use the power for offense than support. A long cooldown means during that period, you are more likely to switch to a weapon to continue your offense, or take advantage of it to perform some other tactical action such as retreating or repositioning.
• Notice the Biotics are very fast, both for Shepard and the Squad. You can almost use them back to back once you start reducing the cooldown.

See the very bottom of this post for the career bonuses to duration and cooldown.

		Cooldown
Duration	Power	Shepard	Power
180.00	Barrier 4 Improved	1.50	Armor Piercing Ammo
180.00	Fortification 4 Improved	1.50	Cryo Ammo
60.00	Barrier	1.50	Disruptor Ammo
60.00	Fortification 1-4	1.50	Incendiary Ammo
60.00	Geth Shield Boost	1.50	Shredder Ammo
45.00	Singularity 4 Heavy effect duration	1.50	Warp Ammo
30.00	Singularity 3-4 effect duration	3.00	Adrenaline Rush 3-4
25.00	Singularity 2 effect duration	3.00	Combat Drone
24.00	Combat Drone 4	3.00	Neural Shock
20.00	Combat Drone 3	3.00	Pull
20.00	Singularity 1 effect duration	3.00	Slam
18.00	Combat Drone Squad	3.00	Throw
16.00	Combat Drone 2	3.00	Unity
12.00	AI Hacking 4 Improved	4.00	Adrenaline Rush 2
12.00	Combat Drone 1	4.50	Cryo Blast
12.00	Dominate 4 Enhanced	4.50	Singularity
12.00	Neural Shock 4	5.00	Adrenaline Rush 1
12.00	Pull 4 Heavy	6.00	AI Hacking
12.00	Stasis 4 Deep	6.00	Charge
9.00	AI Hacking 3-4	6.00	Concussive Shot
9.00	Dominate 3-4	6.00	Dominate
9.00	Neural Shock 3-4	6.00	Energy Drain
9.00	Pull 3-4	6.00	Flashbang Grenade
9.00	Singularity 4 Heavy hold duration	6.00	Incinerate
9.00	Stasis 3-4	6.00	Inferno Grenade
8.00	Slam 4 Crippling cripple duration	6.00	Overload
8.00	Tactical Cloak 4	6.00	Reave
7.00	AI Hacking 2	6.00	Shockwave
7.00	Cryo Ammo 4 Improved freeze duration	6.00	Stasis
7.00	Cryo Blast 4 Full	6.00	Tactical Cloak
7.00	Dominate 2	6.00	Warp
7.00	Neural Shock 2	6.00	Warp 4 Unstable
7.00	Pull 2	12.00	Barrier
7.00	Shadow Strike 3	12.00	Fortification
7.00	Singularity 3-4 hold duration	12.00	Geth Shield Boost
7.00	Stasis 2	12.00	Tech Armor
6.00	Disruptor Ammo 3-4 weapon overheat
6.00	Flashbang Grenade 4 Improved	Cooldown
6.00	Shadow Strike 2	Squad	Power
6.00	Singularity 2 hold duration	1.40	Shadow Strike 4 Rapid on kill
6.00	Tactical Cloak 3	1.50	Armor Piercing Ammo
5.50	Reave 4 Heavy	1.50	Cryo Ammo
5.50	Tactical Cloak 2	1.50	Disruptor Ammo
5.00	Adrenaline Rush	1.50	Incendiary Ammo
5.00	AI Hacking 1	1.50	Shredder Ammo
5.00	Cryo Ammo 3-4 freeze duration	1.50	Warp Ammo
5.00	Cryo Blast 3-4	9.00	Cryo Blast
5.00	Dominate 1	9.00	Inferno Grenade
5.00	Neural Shock 1	9.00	Neural Shock
5.00	Pull 1	9.00	Overload
5.00	Shadow Strike 1	9.00	Pull
5.00	Singularity 1 hold duration	9.00	Shadow Strike
5.00	Stasis 1	9.00	Slam
5.00	Tactical Cloak 1	9.00	Throw
4.00	Charge 2-4 shield duration	9.00	Warp 4 Unstable
4.00	Cryo Ammo 2 freeze duration	12.00	AI Hacking
4.00	Cryo Blast 2	12.00	Barrier
4.00	Flashbang Grenade 3-4	12.00	Concussive Shot
4.00	Inferno Grenade burn time	12.00	Dominate
4.00	Reave 3-4	12.00	Energy Drain
3.50	Flashbang Grenade 2	12.00	Flashbang Grenade
3.50	Reave 2	12.00	Fortification
3.00	Cryo Ammo 1 freeze duration	12.00	Geth Shield Boost
3.00	Cryo Blast 1	12.00	Incinerate
3.00	Disruptor Ammo 2-4 synthetic overload	12.00	Reave
3.00	Flashbang Grenade 1	12.00	Shockwave
3.00	Incendiary Ammo burn time	12.00	Stasis
3.00	Incinerate burn time	12.00	Warp
3.00	Reave 1	20.00	Singularity
1.50	Slam 4 Heavy lift duration	30.00	Combat Drone
1.30	Slam 3,4 lift duration
1.10	Slam 2 lift duration
0.90	Slam 1 lift duration

Career Modifiers:
Basically, the differences in cooldown between level 4 class options are virtually irrelevant as the difference is typically a split second for powers with the common 6-second cooldown.

Duration extension is a more complex issue because it helps you chain powers and has secondary not-easily-quantifiable benefits that are highly situational.

• Adept - Bastion - Cooldown -20%, Duration +15%
• Adept - Nemesis - Cooldown -20%
• Engineer - Mechanic - Cooldown -20%, Duration +15%
• Engineer - Demolisher - Cooldown -20%
• Infiltrator - Assassin - Cooldown -9%
• Infiltrator - Agent - Cooldown -15%, Duration +15%
• Sentinel - Guardian - Cooldown -30%
• Sentinel - Raider - Cooldown -20%
• Soldier - Commando - no bonus
• Soldier - Storm Trooper - Duration +15%
• Vanguard - Destroyer - Cooldown -9%
• Vanguard - Champion - Cooldown -15%, Duration +15%

Cooldown Reduction						Duration Extension
100%	91%	85%	80%	70%		100%	115%
1.50	1.37	1.28	1.20	1.05		3.00	3.45
3.00	2.73	2.55	2.40	2.10		4.00	4.60
4.50	4.10	3.83	3.60	3.15		5.00	5.75
6.00	5.46	5.10	4.80	4.20		6.00	6.90
9.00	8.19	7.65	7.20	6.30		7.00	8.05
12.00	10.92	10.20	9.60	8.40		8.00	9.20
						9.00	10.35
						12.00	13.80
						16.00	18.40
						18.00	20.70
						20.00	23.00