Cooldown Related Mechanic

Some deep mechanics of this game.

Cooldown Basic

Career Skill Cooldown(or Cooldown) is the base length of time that players need to wait after using Career Skill before they can use it again.

All careers have a set amount of Career Skill Cooldown, regardless of the difficulty/career talent/career level.

The only exception to these rules is Outcast Engineer career. Its unique mechanic will be explained in a separate section.

Cooldown Reduction

- Cooldown Reduction Basic

Cooldown Reduction is a type of buff that shortens the Career Skill Cooldown passively.

• Cooldown Reduction can only be triggered when the Career Skill is used and can only be triggered once between two Career Skill uses.
  
• All Cooldown Reduction sources are additive.
  
• Cooldown Reduction does not interact with Cooldown Refund/Cooldown Regeneration.
  
• Cooldown Reduction does not modify the original Career Skill Cooldown value, thus it does not reduce Cooldown Refund values.

- Cooldown Reduction Buff Table

Name	In-game Description	Mechanic
Ready for Action	Reduces cooldown of Morale Boost by 20.0%.	Reduce Cooldown by 18 seconds/20%.
Blend In	Reduces the cooldown of Prowl by 30.0%.	Reduce Cooldown by 27 seconds/30%.
Asrai Focus	Reduces the cooldown of Trueshot Volley by 20.0%.	Reduce Cooldown by 16 seconds/20%.
Indiscriminate Blast	Modifies Victor's pistol to fire two blasts of shield-penetrating shot in a devastating cone. Each kill with the blast increases the amount of pellets in the next blast.	Reduce Cooldown by 17.5 seconds/25%. Has baseline 20 shotgun pellets. Can get up to 20 extra pellets(40 in total).
Volans' Quickening	Reduces the cooldown of Fire Walk by 40.0%.	Reduce Cooldown by 20 seconds/40%.
Trinket Property	5.0% - 10.0% Cooldown Reduction.	Reduce Cooldown by 5.0% - 10.0%.
Chaos Waste Power Up	20.0% Cooldown Reduction.	Reduce Cooldown by 20.0%.

Cooldown Regeneration

- Cooldown Regeneration Basic

Cooldown Regeneration is a type of buff that charges the Career Skill Cooldown passively.

• All careers(except Outcast Engineer) have a built-in Cooldown Regeneration of 100%, or charge your Career Skill Cooldown 1 second every second.
  
• All Cooldown Regeneration sources are additive.
  
• Cooldown Regeneration does not interact with Cooldown Refund/Cooldown Reduction.

- Cooldown Regeneration Buff Table & Mechanic I

Name	In-game Description	Mechanic
Career Base Cooldown Regeneration	N/A	Equal to 100% Cooldown Regen.
Inspiring Blow	Staggering an Elite enemy accelerates the cooldown of nearby allies by 100% for 0.5 seconds.	Has a range of 40(4 times the range of Ironbreaker/Witch Hunter Captain career skill). Actually provides 200% Cooldown Regen for 0.5 seconds.
Grail Knight Quest: Slay Monsters	N/A	Provides 10% Cooldown Regen without talent. Provides 15% Cooldown Regen with talent Virtue of Purity .
Adrenaline Surge	On max stacks, Trophy Hunter grants cooldown reduction for Leap.	Buff lasts as long as Trophy Hunter is on max stacks. Provides 200% Cooldown Regen.
Build Pressure	Holding reload with the Steam-Assisted Crank Gun (Mk II) equipped builds Pressure. Each stack of Pressure lasts for 12 seconds and gradually restores the Ability Bar. Stacks up to 5 times.	Each stack provides 40% Cooldown Regen for 12 seconds.
Focused Slaying	Killing an enemy with a Backstab grants Cooldown reduction for 3 seconds.	Provides 100% Cooldown Regen for 3 seconds.
Righteous Regeneration	You Attacks consume up to 3 Temporary Health. Upon consuming 30 Temporary Health, gain a buff that provides 3 Temporary Health per seconds, 30% Cooldown Regen for 10 seconds and refresh the duration of other Skull Boons.	Provides 30% Cooldown Regen for 10 seconds. Increased to 45% Cooldown Regen for 15 seconds with Skulls Slaughter Boon Set.
Verena's Inspiration	Increases Ability Bar cooldown rate by 10%.	Provides 10% Cooldown Regen.

- Cooldown Regeneration Buff Table & Mechanic II

Name	In-game Description	Mechanic
Nethu's Harvest	Every 3 seconds, when you inflict a headshot on an enemy, spawn an Essence Orb at their location. The Essence Orb grants increased Cooldown Regeneration for 0.5 seconds.	Orb provides 450% cooldown regen for 0.5 second.
Bomb of Alchemical Concentration	Your Bombs consecrate the ground for 10 seconds on impact. Players within the consecrated ground gain 1000% Career Skill Cooldown rate.	Within consecrated ground gain 1000% cooldown regen. The consecrated ground lasts 10 seconds.
Ranald's Hearty Plunder	When a Chest of Trial is activated, creates consecrated ground that grants you 500% Cooldown rate for 30 seconds.	Within consecrated ground gain 500% cooldown regen. The consecrated ground lasts 30 seconds, or until the Chest of Trial is finished.
Ranald's Hasty Gamble	You gain 100% Cooldown rate, decreased by 25% per Rarity level of your Highest Rarity weapon.	Provides extra 100%/75%/50%/25%/0% cooldown regen when owning a Plentiful(White) Common(Green)/Rare(Blue)/Exotic(Orange)/Unique(Red) weapon. Use the highest rarity weapon in your inventory.
Ladrielle's Meditation	Each 5 seconds not getting hit increases your Career Skill regeneration by 5%. Max stacks 5.	Each stack provides 5% Cooldown Regen.
Potion of Concentration	N/A	Default/Proxy/Home Brewer: Provides 1000% Cooldown Regen for 10 seconds. Decanter: Provides 1500% Cooldown Regen for 15 seconds. Concoction: Provides 1000% Cooldown Regen for 5 seconds.
Twitch Vote: Boon of Concentration	N/A	Provides 500% Cooldown Regen for 60 seconds.

Cooldown Refund

- Cooldown Refund Basic

Cooldown Refund is a type of event that shortens the Career Skill Cooldown actively.

• Cooldown Refund may trigger multiple times between two Career Skill uses. E.g Resourceful Combatant can proc multiple times before your Career Skill is ready.
  
• Cooldown Refund is tied to Trait/Talent/Chaos Waste Boon, and innate career-specific properties like Cooldown On Hit/Cooldown On Damage Taken events.
  
• Cooldown Refund does not interact with Cooldown Regeneration/Cooldown Reduction.

- Cooldown Refund Event Table & Mechanic I

Name	In-game Description	Mechanic
Career built-in Cooldown On Hit	N/A	Can trigger once on each enemy per attack. Work for both Damage & Stagger Cleave. Melee Attacks can trigger multiple times per attack. Range Attacks can trigger once per attack. For Bash Attacks , only hitboxes that deal damage can trigger this. Can trigger multiple times in each working hitbox. Limited Target Attacks can trigger once per attack. For Explosions , currently can trigger once on host and multiple times on client.
Career built-in Cooldown On Damage Taken	N/A	Only consider non-self dealt damage. Use actual damage taken for refund(aka. after damage reduction calculation).
It's Hero Time	Resets the cooldown on Valiant Charge when an ally is incapacitated.	Refund 30 seconds/100% of max Cooldown each time.
Master of Improvisation	Reloading a weapon reduces the cooldown of Disengage by 2 seconds.	Refund 2 seconds/1.67% of max Cooldown each time.
The Rolling Mountain	Killing enemies with melee attacks while on full stamina reduces the cooldown of Impenetrable by 2.0%.	Refund 2.4 seconds/2% of max Cooldown each time.
Perilous Overclock	Building Pressure at Max stacks restores 25% charge and grants 8% Critical Hit chance but damages Bardin. Each Overclock increases damage suffered.	Refund 25% of max Cooldown each time.
Spirit Arrows	Amaranthe reduces the cooldown of Trueflight Volley by 5.0% every tick. No longer restores health.	Refund 4 seconds/5% of max Cooldown each time. Tick every 10 seconds, doesn't matter how much HP Kerillian has.
Piercing Shot	Trueshot Volley fires one piercing shot dealing heavy damage. Headshot refunds 100.0% cooldown.	Refund 80 seconds/100% of max Cooldown each time. Can trigger on hitting enemy Head & Neck.
The Unending Hunt	Hitting 10 or more enemies with Animosity refunds 40.0% cooldown.	Refund 36 seconds/40% of max Cooldown. Can only trigger once per Career Skill use.
Just Reward	Ranged critical hits reduces the cooldown of Locked and Loaded by 20.0%. Can only trigger once every 10 seconds.	Refund 14 seconds/20% of max Cooldown each time.
Double-shotted	Modifies Victor's sidearm to fire two powerful bullets in a straight line. Scoring a headshot with this attack reduces the cooldown of Locked and Loaded by 60.0%.	Refund 42 seconds/60% of max Cooldown each time. Can only trigger once per career skill.

- Cooldown Refund Event Table & Mechanic II

Name	In-game Description	Mechanic
Flagellant's Zeal	Each hit during Holy Fervour grants a stack up to 10. Each stack reduces the cooldown of Holy Fervour by 5.0% when the buff fades.	Refund 3 seconds/5% of max Cooldown each stack each time.
Fires from Ash	Killing a burning enemy reduces the cooldown of Fire Walk by 3.0%.	Refund 1.5 seconds/3% of max Cooldown each time. Has a internal cooldown of 0.5 second.
Blazing Echo	The Burning Head critical hits refund its cooldown.	Refund 50 seconds/100% of max Cooldown each time. The critical hit must land on an enemy target.
Abandon	During overcharge, Sienna expends health to increase ability cooldown rate.	Take 5% of Max Health as damage and refund 12 seconds/10% of max Cooldown every 0.25 seconds, until the Cooldown is ready.
Spirit Leech	Killing an elite enemy restore 15% cooldown.	Refund 16.5 seconds/15% of max Cooldown each time. Triggers when Necromancer or skeletons killing elites. Does not trigger on specials.
Skulls Cooldown Boon	Picking up a Daemon Skull refreshes 35% of your Ability Bar.	Refund 35% of max Cooldown each time. Increased to 43.75% with Skulls Pick Up Daemon Skull Boon Set.
Drakira's Thirst	Killing a Special replenishes 10% of your ability bar.	Refund 10% of max Cooldown each time. Can be triggered by you or your teammates killing specials.
Xokha's Duty	Using your Career Skill returns 10% of nearby allies' Ability Bars.	Refund 10% of max Cooldown each time.
Hekarti's Jealousy	Each time a nearby ally uses their Career Skill you replenish 10% of your Ability Bar.	Refund 10% of max Cooldown each time.
Neru's Patience	Blocking enemy attacks reduces Career Skill Cooldown.	Refund 2 second of cooldown each time.
Resourceful Combatant	Melee critical hits reduce the cooldown of your Career Skill by 5.0%. This effect can only trigger every 4 seconds.	Refund 5% of max Cooldown each time. Share the internal cooldown timer with Resourceful Sharpshooter .
Resourceful Sharpshooter	Range critical hits reduce the cooldown of your Career Skill by 5.0%. This effect can only trigger every 4 seconds.	Refund 5% of max Cooldown each time. Share the internal cooldown timer with Resourceful Combatant .

Special Case: Outcast Engineer

Outcast Engineer has several distinct differences compared to other careers in regard to Career Skill Cooldown part.

• Outcast Engineer is the only career that can modify the max Career Skill Cooldown value. Default/Gromril-Plated Shot/Linked Compression Chamber version all have 60 seconds of Career Skill Cooldown, while Innovative Ammo Hoppers has 90 seconds.
  
• Outcast Engineer has 0 Cooldown On Hit/Damage Taken value and 0% natural Cooldown Regeneration. Instead he can get access to Cooldown Regeneration through his passive Build Pressure.
  
• Outcast Engineer does not consume all of his Career Skill Cooldown with one activation. Instead each bullet he shot with his Career Skill cost a certain amount of Career Skill Cooldown.

	Default Version	Gromril-Plated Shot	Linked Compression Chamber	Innovative Ammo Hoppers
Round cost	0.75 sec/round	2 sec/round	0.75 sec/round	0.75 sec/round
Total rounds for full Career Skill bar	80 rounds	30 rounds	80 rounds	120 rounds
Resourceful Combatant & Sharpshooter regen	4 rounds/proc	1.5 rounds/proc	4 rounds/proc	6 rounds/proc

Appendix: Career Skill Cooldown and Cooldown On Hit/Damage Taken Table

Career	Career Skill Cooldown (seconds)	Cooldown on hit (seconds per hit)	Cooldown on damage taken (seconds per damage taken)
Mercenary	90	0.5	0.5
Huntsman	90	0.3	0.4
Foot Knight	30	0.25	0.5
Grail Knight	60	0.25	0.25
Ranger Veteran	120	0.3	0.3
Ironbreaker	120	0.25	0.5
Slayer	40	0.5	0.1
Outcast Engineer	60/90	0	0
Waystalker	80	0.35	0.3
Handmaiden	20	0.25	0.5
Shade	70	0.5	0.2
Sister of the Thorns	40	0.3	0.4
Witch Hunter Captain	90	0.5	0.2
Bounty Hunter	70	0.25	0.3
Zealot	50	0.5	0.2
Warrior Priest of Sigmar	70	0.25	0.25
Battle Wizard	50	0.25	0.5
Pyromancer	50	0.25	0.3
Unchained	120	0.25	0.5
Necromancer	110	0.25	0.25

[Royale w/ Cheese]

fixed thanks

[ Dovahbear ]

Does Zealot's cooldown on hit have a typo? I checked the source code and it says 0.5, not 0.55.

[Royale w/ Cheese]

Yes, all CD regen work on engi, and yes they stack.
Resourceful Sharpshooter you need to hold range weapon.

[Taconice]

Some Engi questions:
Does all CD regen work on him (Inspiring blows, GK quest, ...) and are they active all the time?
Can Resourceful sharpshooter be procced with the crank gun or do you need to hold your ranged weapon?

[Peter Panic Parry]

Royale! Thanks for this indepth information

[Royale w/ Cheese]

All cooldown regen/refund work on him.
But engi can't get Xokha's Duty and Ladrielle's Meditation naturally in chaos waste.

[Nitro, the sanest Huntsman]

Question: what CW boons affect Crankgun 's regen and which don't?

Drakira's and Hekarti's certainly do, as well as CDR bension, but what about other boons? Never felt like Ladrielle's made a difference

[Royale w/ Cheese]

It can be good.

[EvilNando]

wait so, cooldown reduction items are not that great then?

[Chestilence]

Hmm ok. Thanks for answer