The reason i pick 23.7.0 is because i think that nocturne should get a little healthy but still deal tons of damage.

As allmost everybody i start out with my Q A.K.A duskbringer.
I do this to deal AOE dmg to my enemies and to do tons of early dmg.
my ability no. 2 is W A.K.A shroud of darkness. many pepole would think that this is a bad idea because you only need the spellshield for ganking. but i still just like the speedbuff.
And then my E. Unspeakable horror. this ability fears the enemy and that is why i pick it as lvl 3. cause then i am sort of ready to gank bot-mid-top.
(sorry for bad english)
I max my Q and my W beacause then i will burst down my enemy and get a kill/assist.

I pick Armor pen. quints. and marks because that will allow me to deal more dmg to everyone. And then armor pen is just so awesome. :D
I pick armor and magic resist at the two other sections cause then i can resist dmg more than if i had raw AD. This do allow me to say in Lane/jungle for vary long time.

I do as most junglers start wtih cloth armor and 5 health pots. because that will allow me to stay in jungle for a long time.
then i go for a wriggles lantern for lifesteal, armor and dmg. this allso allow me to deal an additional dmg to minions and monsters. + a free ward.
As you can see i rush a warmog's armor for more health. this too lets me stay in jungle and i am able to tank some dmg or even a turret!
Ninja tabi is just because i want some armor.
Frozen mallet will allow me to slow my enemies and that is in it self a very great thing.
Phantom dancer is for attack-speed and crittical chance.
Atma's impaler is there to gime me a bonus DMG from the healt i have collected.
At last. i will sell my wriggles lantern and buy a bloodthirster for alot of dmg and the liftesteal.

I choose smite because i am a jungler and need some fast dmg to the mobs.
Flash is an easy way to get kills or get away in dangerous siturations.

Enjoy :D