Damage Over Time

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DER_PSYCHOPATH wrote:

Increased Duration Support will affect skill effect duration, including the skill effect duration of DoT skills that have an inherent damage over time component as opposed to the ailments that Maxtrux explained. I do not know why he left out those skills.

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DER_PSYCHOPATH wrote:

Dealing damage or burning slower / faster does not affect the total damage dealt by a DoT effect, but does effect its dps, even if only one instance may be active.

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Ignites you inflict deal Damage 50% faster – Ignited enemies burn 50% faster with the Goddess Scorned equipped. This means ignites deal 50% more fire damage per second and have ~33% less duration. Expressed arithmetically, fire damage over time from ignites is multiplied by (100 + 50)/100, while ignite duration is multiplied by100/(100 + 50). The total fire damage inflicted by one instance of ignite remains the same after these adjustments, but the duration is shortened.

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Maxtrux wrote:

Ah, here is the point. Increasing duration will increase the effective Dot dealt.

Here is an example:

Poison deal 20% of the combined Physical and Chaos damage from an hit as Chaos Damage per second. Its base duration is 2 Seconds, except when used with Viper Strike, which applies a 4 second Poison.

So, suppose you hit an enemy with Viper Strike and deal 1000 physical damage. The poison you apply deal 1000*0.2 = 200 Chaos Damage per second, per 4 seconds, resulting in a 200*4 = 800 damage after those 4 seconds.

Now, suppose you increase Poison duration of 100%. This means your Viper strike will actually deal a poison that lasts 4*(1*2) = 8 seconds. With this, in one single Viper Strike you will deal 200*8 = 1600 damage, but it will take 8 seconds for fully deal it

When you are playing a DoT build, usually you have a hit&run tactic, in where you deal one single hit and then kite around waiting for the effect to end (in case of non-Crimson Dance bleeding or non-stacking Ignitions) or pile up a lot of hits and keep dealing damage on the enemy while you are kiting its attacks. In other words - you are looking to end a fight potentially with one big hit, but it will take a couple of seconds to actually end, rather than oneshotting.

Addictionally, as a KB Poison Wanderer Assassin in Delirium, there was quite a pleasure to look at my mangled, dead corpse - so far from further harm - and look at a screaming Elder that was slowly whittling away from the 40 10-seconds Poison I applied before, spiralling into the abyss...

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DER_PSYCHOPATH wrote:

Increased Duration Support will affect skill effect duration, including the skill effect duration of DoT skills that have an inherent damage over time component as opposed to the ailments that Maxtrux explained. I do not know why he left out those skills.

As Maxtrux explained, the duration of ailments can also be scaled, but not by skill effect duration and instead by ailment duration. Exceptions to this are Viper Strike and Puncture, which override the default duration of the poison and bleeding they inflict respectively, so they can be scaled by both skill effect duration and ailment duration.

Increasing the duration of a DoT effect will not lower its damage per second, so increasing the duration will increase the overall damage that an enemy takes from a DoT effect. This applies to both regular modifiers to the DoT effect duration as well as modifiers to its expiration rate like Temporal Chains.

Because all DoT effects except poison are limited to a maximum number of stacks that deal damage, increasing their duration does not necessarily increase your dps after some point. By default only one stack may be active (although several can be applied at the same time). DoT effects that may have more than one active instance (again, except poison which allows pseudo infinite active stacks) usually state so explicitly.

Dealing damage or burning slower / faster does not affect the total damage dealt by a DoT effect, but does effect its dps, even if only one instance may be active.

A general tip to scale your damage:
Most stats affecting DoT are multiplicative just like for most skills, so other than inherently multiplicative modifiers (with "more") the most valuable stat is always the one of which you have the least.

So in order of importance it is roughly more damage > deals damage faster > damage over time multiplier > increased damage. Individual differences in what has a greater benefit for your build may arise depending on the values of the stats and how much you have of them already.

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DRBrown994 wrote:

Just one thing, can you delve into your point of "the most valuable stat is always the one of which you have the least", this would be in relation to the core stats of the build?

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DER_PSYCHOPATH wrote:

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DRBrown994 wrote:

Just one thing, can you delve into your point of "the most valuable stat is always the one of which you have the least", this would be in relation to the core stats of the build?

Let us take ailments deal damage 10% faster, 10% DoT multiplier, and 10% increased damage.

If you have no other stats, they all do the same for your dps (without accounting for the possibility of having only a single DoT instance but applying the debuff several times).

Let us say you instead have ailments deal damage 10% faster, 30% DoT multiplier, and 200% increased damage.

An additional 10% of each would give you 9.1% more dps, 7.7% more dps and total damage, and 3.3% more dps and total damage.

Thus, you can see that in this example, ailments deal damage 10% faster is slightly more powerful than DoT multiplier, and both of them are considerably more powerful than increased damage, simply because you already have more of it.

Mathematically they have equal importance, but their value is based on their scarcity. It's easy to get a lot of increased damage, more difficult to get DoT multiplier, and dealing damage faster is a fairly rare stat that can barely be obtained from any items and only has a couple of low values available on a few nodes on the skill tree.