Six Feet Under and Dark Senses are atrociously designed challenges.

What Im about to talk about isn't limited to these 2 challenges, but they're the most notable examples of bad challenge design. Yes, it's a bit of a rant but I also believe there is solid, constructive criticism in here :O

Dark Senses: Finish repairing 4 generators using the perk Dark Sense

Six Feet Under: Sacrifice 4 survivors in the basement

Both of those are master challenges, meaning they have to be completed in a single trial.

1. They're not challenges, they're based on luck, atleast for a solo player and forcing farming and/or SWF to even have a chance at completing a challenge is just bad design, especially since they know better than anyone that the majority plays solo. This mistake has no right of repeating in future tomes.
2. These challenges are also simply frustrating, they force you to play in a specific way, which by itself isn't bad, but they force you to use really abstract strategies, and allow no room for failure whatsoever, but that is a problem with Master Challenges in general and why I don't like them, coming close to completing a challenge, but failing grants no progress at all and leads to frustration after several tries, since you have no way of anticipating how many times you'll have to try again.
3. Another problem with these challenges is their dependency on other players, both can be ruined by 1 player extremely easily, without him even knowing/trying, then imagine how bad it can be when someone actually IS trying to ruin the challenge, further forcing you to farm/SWF.

Now onto more specific problems with each of these challenges.

Six Feet Under:

Now, Im all over some RNG in the challenges to keep them interesting, but with how DBD is, this challenge was a bad idea all along, I have no idea how it made it in. Im talking about maps, there are so many different maps, some are big, some are small, some have basements in the middle, some have basements in the corner, some are The Game. It's not unlikely for your "try" to get invalidated at the very beginning due to getting a bad map and not even Agitation + Iron Grasp can help you with that.

I talked about frustration while doing challenges earlier. Survivors have it too, even more of it. Or should I call this pure boredom ? They're robbed of a normal match, instead forced to play some kind of basement party with a camping killer, because due to maps, camping is the only viable way of completing this challenge. (yes. Coming back as demo or hag immediately after an unhook is basically the same as camping) It's so incredibly boring for survivors (Hey ! It's just like that for killers too !) you start to not blame them for DCing.

Dark Senses:

This challenge is also plain boring for survivors, you're not allowed to have chases while doing this challenge, because you have to be on gens literally the whole time, and idk about you but to me chases are the only fun part of the game, for either roles. Sure, you theoretically can work around that and have your teammates 99% gens (granted they're SWF ofc), but this is so ... uncomfortable (Can't find a better word) and basically throws you the game with the disarray it causes. We were trying to get it for a friend that way, and none of us were having fun because of this.

I may be repeating myself here, but this challenge requires SWF. It's not possible to complete without immense luck as a solo, at which point it's not even a challenge, because a challenge is supposed to be challenging your skill, not your luck.

Well, I think I got my point across well enough. I managed to get Dark Senses thanks to my friends, but I gave up on Six Feet Under. I know it's the 1st Tome, hence we shouldn't be too mad about it. (even though it boggles my mind how these challenges got implemented the way they were lol) Let's hope the Devs collect feedback and come up with something better next time ! With all that being said, what are your thoughts on that, and the way challenges currently are in general ?