Delve encounters 4 and how to find them

Hello fellow challenge hunters. I am pretty sure this challenge will be the last one to be done in most of our lists.
So i talked with some friends and challenge hunters and we have found a solution. A solution probably most of you have thought but had no proof that it worked.
I am here to tell you it works and i have proof.
The solution is we delve at 90 depth sideways so delving costs less and we have more chances to find a fossil stash.Aquick info fossil stashes we look for can spawn 83+ depth min.
I suggest not going 90+ cuz sulphite cost increases exponentially.
And heres the proof that this solution works;
https://imgur.com/a/bXCCN62
Some might argue that delving on deeper levels has more chances to spawn these stashes but i think its not worth taking this risk of dying and wasting too much sulphite.
I hope this post helps you on your hunting have a good day exile :)

I will list the biomes these fossils stashes can be found. The kind of stash you find changes according to its biome base.

-Haunted tomb : fungal caverns
-stonewood hollow : petrified forest
-crystal spire : abyssal depths
-time-lost cavern : frozen hollow
-molten cavity : magma fissure
-humid fissure : sulphur vents

How this information can be usefull?
Based on this information while we search for fossil stashes we can go down a few levels in biome types we need for our challenges.

Wow, thanks for the tip! Any tips on finding bosses? I delved to 300 and have spent I dont know how much sulphite delving sideways at various depths and not a single boss room yet.

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Phaeded wrote:

Wow, thanks for the tip! Any tips on finding bosses? I delved to 300 and have spent I dont know how much sulphite delving sideways at various depths and not a single boss room yet.

Bosses spawn pretty high rate at deeper levels like 500+ you can find 1 boss every post. But to be able to do all boss challenges i suggest you to get a taxi and try killing them on someone else's mine.

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MrsDeath_ wrote:

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Phaeded wrote:

Wow, thanks for the tip! Any tips on finding bosses? I delved to 300 and have spent I dont know how much sulphite delving sideways at various depths and not a single boss room yet.

Bosses spawn pretty high rate at deeper levels like 500+ you can find 1 boss every post. But to be able to do all boss challenges i suggest you to get a taxi and try killing them on someone else's mine.

Figured as much. I hate buying challenges that way. Feels cheesy but I guess it’s the only viable way. Pretty shitty design IMO.

I've been doing the same. Confirm it works, and 18k sulphite will keep you going sideways for quite a while. Sadly, the rooms are still quite rare and it sucks to get repeats (i've found the humid fossil room 3x)

This challenge really need some rework

like 4/6 challenge complete not 6/6

or can party sharing

Please lord chris save us

This is so boring

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bobo1111 wrote:

This challenge really need some rework

like 4/6 challenge complete not 6/6

or can party sharing

Please lord chris save us

This is so boring

i agree on that.
6/6 requires too much rng and i think it should be 4/6 or smth

New information added.

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MrsDeath_ wrote:

Bosses spawn pretty high rate at deeper levels like 500+ you can find 1 boss every post.

Not true. Aul spawns at 250+ and the other 2 much sooner. There is no reason to dig deeper than 250 UNLESS you want the 600-depth challenge. There is a boss exploit going on so boss taxis are super cheap now. EDIT: or the 300 challenge of course.

But thx OP for sharing.

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silverdash wrote:

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MrsDeath_ wrote:

Bosses spawn pretty high rate at deeper levels like 500+ you can find 1 boss every post.

Not true. Aul spawns at 250+ and the other 2 much sooner. There is no reason to dig deeper than 250 UNLESS you want the 600-depth challenge. There is a boss exploit going on so boss taxis are super cheap now. EDIT: or the 300 challenge of course.

But thx OP for sharing.

According to datamined info on poedb primeval ruins have a spawn weight of 4 at depth 220 and a spawn weight of 12 at depth 600, so you're about 3 times more likely to find Aul in deeper delves. The other city spawn rates go up by about 50% and also cap out at depth 600.

As for the delve encounters IV, i've found one at depth 96 and another at 120, but they're hundreds of nodes apart horizontally. They do seem to get a lot more common at deeper depths, but the sulphite cost also goes up exponentially.