Mass Prospect Phaedrum

Did a lot of prospecting, the values in the table are the amount of each item I received per ore prospected

Ore

Ore Prospected

Angerseye

Oriblase

Umbryl

Essence of Valor

Essence of Rebirth

Essence of Servitude

Essence of Torment

Solenium Ore

1000

0.114

0.095

0.1

0.044

0

0

0

Sinvyr Ore

1000

0.099

0.099

0.108

0

0

0

0.069

Phaedrum Ore

1000

0.106

0.096

0.097

0

0.063

0

0

Oxxein Ore

1000

0.092

0.106

0.087

0

0

0.062

0

Laestrite Ore

1000

0.103

0.102

0.088

0.008

0.006

0.004

0.002

Elethium Ore

500

0.218

0.164

0.202

0.064

0.07

0.07

0.082

***In short***! - Almost every uncommon ore has the same chance of giving you an essence!

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• Every ore has a 0.066 to 0.068 chance to yield one essence
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• This mean it take roughly 15 ore (a.k.a 1 ore divided by 0.067) to get one essence
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Over the past, almost a year, I've kept a spreadsheet of my major prospecting sessions. I have the data form roughly 275,000 ore that's generated roughly 18,500 essence. I've kept this data and analyzed them with descriptive statistics to report the following.

My data is almost exclusively:

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• From: (Solenium Ore - Oxxein Ore - Phaedrum Ore - Sinvyr Ore)
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• To yield: (Essence of Valor - Essence of Servitude - Essence of Rebirth - Essence of Torment) respectively
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The complicated answer:

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• The only ore that has a parametric outcome (i.e. will AVERAGE 1 essence per 15 ore) is Sinvyr Ore
• 
  
• The other three, Solenium Ore - Oxxein Ore - Phaedrum Ore, are nonparametrically distributed, which mean that a MEDIAN of 15 ore gets you one essence
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I'm a big fan of stats if you can't tell! So what does this complicated answer mean?

When you're trying for just a bit of essence (Maybe < 100 essence from < 1500 ore)

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• If you're trying to get Essence of Torment, you can roughly times the amount of essence you need by 15, buy that, and be regularly pretty close to what you want! Some times you get a bit more, maybe a but less, and that all seems to make solid sense. It has a normal bell curve right over 15 ore to get one essence, and it doesn't seem super crazy when you're a bit short or have a bit extra.
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• If you want less than 100 Solenium Ore, Oxxein Ore, or Phaedrum Ore, good freaking luck! You'll end up with wildly too few or wildly too many all the time. The MEDIAN or the MOST times you really end up needing 15 but who the heck knows!
• 
  

When you're trying for just a bit of essence (Maybe > 100 essence from > 1500 ore)

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• Larger sessions will end up neutralizing a lot of this strange variance. So if you want prospect a ton of ore for a ton of essence, all you need to estimate is a 15:1 ratio!
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• What's a ton? Roughly the quantity above or the amount of time between patches in Shadowland ;)
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• I tend to prospect 3000 ish ore a time with really reliable results
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Happy crafting y'all!

Other helpful links:
[Guide=10274]; Mass Prospect Oxxein; Mass Prospect Phaedrum; Mass Prospect Sinvyr; Mass Prospect Solenium