Corrupted Area Spawns

Neglected cellar also in normal Hedge Maze.

It seems rather "above ground act 3" wide.

Concealed Cavity also spawns on The Lower Submerged Passage. IDK why I can't post a screenshot though.

Secluded Copse also spawns on Blackwood.

Found the Forgotten Oubliette in the lower prison. Boss is something-The Shadow Of Malice. A ghostly archer who uses puncture, has fast attacks, and killed my reasonable tanky scion in about 1.5 seconds. I gave up after that.

any1 done blind alley yet? can't seem to find it anywhere.

Ok so i just found blind alley. Took me 5 hours to find it but maybe that was just bad luck.

Location : Warehouse district (not warehouse sewers)

Boss : M'gaska, the living pyre
Class : Totem
Mods : Resists elemental damage, Resists chaos damage
Abilities : Flameblast, totems that summon raging spirits at crazy rate.

Screenshot:

You didn't have bad luck.

I spend almost the entire day looking for vaal areas yesterday and that one was the most annoying one, because it overlaps with neglected cellar.

Added substantial information, thanks to all for your replies and private messages.

Special shoutout to Hilbert; i've used most of your information and comments; though I have deleted a 'stupid' or two (and left lots of others in place when it was just too appropriate) to keep the tone of the OP constructive. I hope you don't mind.

Here are some basic strategies against the Top 6 stupid Bosses.

Being overleveled always helps. My points of view were from really basic EQ on a defensive build.


Disused Furnace
The best way to finish Disused Furnace without overpowered gear would be Searing Bond, because you can deal damage while moving and 2-3 Firestorms don't hit that hard.
In all other cases: Slow Attack/Castspeed= Much damage.

Even with a strategy this willbe the hardest boss because you don't have much room to move so you will always walk in some fire storms.


Entombed Alcove
Simple and easy got CI and you will take next to no Damage. Or keep moving, so the Chaos Clouds won't stack on you.



Forbidden Chamber
Best way would be to kill the totems as Ranged and keep the Shock Nova Totems alive. There seems to be a limit of 6 Totems.

The Icetotems are the hardest hitting ones you should destroy, the other totems are rather close ranged.



Forgotten Oubliette
The Best way to defeat him would be to maximize projectile speed and blindfire on him.
IC works against puncture. But I couldn't verify if his base damage is high or he also deals chaos damage.




Inner Grounds
Charge straight to the boss ignore everything or destroy all corpses and use single target damage.
CwDT+ IC works only on melee attacks his spitting is also extremly fast.
Every attempt resulting into Soul Eater and Corpses creates a beast.
A pumped up cruel Bloodmoon deals more damage than Dominus Merciless because his attacks look like a graphic error(20+ attacks per second)

You shouldn't join a public party doing that boss in HC when you weren't there at start, it is very likely that he is already pumped to an extent to one shot you.

With many souls eaten this is the hardest Boss by far.


Narrow Ravine
The Best strategy would be to use a summoner with ranged spectres using skeletons at meatshield to receive the curse.
But be aware that this boss hits harder than the Orchard Boss as level 66 guest on 75 lightning resists.

Running in circles and using a Spectralthrow also works but it takes a lot of time.

More info on Hidden Alcove - within Crypt lvl 1 and 2 (Need to open a Sarcophagus with beating hard above it)

Name: Shrapnelbearer
Mods:
Quick, Far Shot, Resists Elemental Damage, Resists Chaos
Has both a single target Chaos damage attack, and a multiple projectiles version

Runs back if you get within melee range, very high HP. Damage isn't too bad in normal, but smarts a lot in Cruel. Merciless with -60% chaos res should be very hard