Cyclic, lunar, metamorphosing
You might get outstalled by similar pokemon. I'm pretty sure crocune could outstall this set. Ice beam wouldn't do anything and with rest it might be able to take curse well.Here's a set I came up with that has been bringing me some success recently.
IVs: 31 / * / 31 / 31 / 31 / *
EVs: 252 HP / 220 Def / 36 SpDef
Moveset: Calm Mind / Ice Beam / Rest / Curse
This guy is for late game when you have removed all of your opponents suspected Taunters.
Why would I want to bother raising Dusknoir's base 65 SpAtk, you might ask. Well, the SpAtk boost is nothing more than novelty. The important part of the Calm Mind is to boost the SpDef. After 1 Calm mind, Ice Beam can take out all versions of Salamence and survive the Life Orbed Outrage with pleanty of HP to spare afterwords.
Rest is there to heal after Curse, which is there to take out bulky Waters and Steels. You shoud be able to survive the two turns of sleep versus anything not named Weavile, but Weavile should have been taken out of the game by then anyways, as I would naturally suspect it to be carrying Taunt.
All of that stuff is pretty much novelty, as well, since the idea is to stall via Pressure. While Resting up, your opponent is firing off whatever it will do, while you are stat boosting the SpDef and making your opponent BEG for a critical hit.
Anything at (or after) +2 Calm Mind means loosing half of your HP using Curse does next to nothing when you can Rest back your HP, and more than survive the two turns you're taking a nap.
Calcs: Max sp.atk Dusknior ice beam on Max sp.def Crocune 5%-6%
Max sp.atk Crocune surf on Max sp.def Dusknior 23.8%-28.6%
If you curse while he surfs, he can outspeed you next turn for a probable ko. You have a slight chance of surviving to rest, but not a lot. This is assuming sandstorm to cancel leaftovers.