calculate firestorm dps with PoB

PoB gives the follow information with firestorm:



So we have average damage and cast rate (per second I think?). Since firestorm hits once every .1 second, we have 10 hits per second.

average_damage = 234.5
cast_rate = 1.87
hits_per_second = 10

Would my DPS = average_damage * hits_per_second * cast_rate?


If I run spell echo, do I double my cast rate in the calculation?
Last bumped on Feb 2, 2018, 3:09:27 PM
have you ever observed how firestorm performs? you seem to assume that all the balls will hit single enemy

in hit count calculation you have to

1) consider cast rate (or trigger rate) and skill duration to determine how many total balls you are able to create per second, in other words how many firestorms you are able to have active at once

2) calculate probability of monster being hit by single ball. variables are: storm area, ball area, monster area (hitbox, which is afaik not known so you can only assume, this makes huge differences) and monster movement (unpredictable thus you have to neglect that)

its not the very easy one.. have you tried googling for some calculator?


IGN: Eric_Lindros
CET: Timezone
Last edited by Ludvator#6587 on Feb 2, 2018, 2:08:19 PM
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Ludvator wrote:
have you ever observed how firestorm performs? you seem to assume that all the balls will hit single enemy

in hit count calculation you have to

1) consider cast rate and skill duration to determine how many total balls you are able to create per second, in other words how many firestorms you are able to have active at once

2) calculate probability of monster being hit by single ball. variables are: storm area, ball area, monster area (hitbox, which is afaik not known so you can only assume, this makes huge differences) and monster movement (unpredictable thus you have to neglect that)

its not the very easy one.. have you tried googling for some calculator?




Then my calculation would be max_dps, assuming all fireballs are hitting 'something'. Maybe not single target DPS. I also just realized spell echo is calculated into cast rate in PoB.
your calculation would say nothing:)

where does your 250ms cooldown come from? you sure you actually use your cast speed?

IGN: Eric_Lindros
CET: Timezone
Feel free to offer me a calculation, but as of right now it makes sense that my calculation was max dps (with the assumption all fireballs hit something).

I did not use the CD in calculation, I will have to think about it.
On a normal size Firestorm, only about 25-30% of the balls hit a single target of regular size. With larger bosses, it can reach up to 50-75%. The cast rate and duration determine how many overlapping firestorms you can have going on. So an example for average regular size enemy dps would be:

3 overlapping firestorms * 10 balls per second * 25% of balls hit the target * ball damage of 250 = 1875 DPS.
Last edited by zagibu#1371 on Feb 2, 2018, 2:37:00 PM
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zagibu wrote:
On a normal size Firestorm, only about 25-30% of the balls hit a single target of regular size. With larger bosses, it can reach up to 50-75%. The cast rate and duration determine how many overlapping firestorms you can have going on. So an example for average regular size enemy dps would be:

3 overlapping firestorms * 10 balls per second * 25% of balls hit the target * ball damage of 250 = 1875 DPS.


Great information, thank you. Now that leads me slightly into another question; what stage of scorching ray should I be comparing DPS to? PoB support stages 1/4/8 while the stage 8 is about 6x the DPS of stage 1.
"
Furor_Dei wrote:

Now that leads me slightly into another question; what stage of scorching ray should I be comparing DPS to? PoB support stages 1/4/8 while the stage 8 is about 6x the DPS of stage 1.


castspeed x SR duration = max stack

Requires to stand still and cast long enough though. If you have to move more frequently, you wont achieve as much stacks.

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