this is my first build to nocturne. Though he is my main so i've studied many builds for him. this is the jungle one and you will need to do alot of ganking so you get more gold faster. he is a tanky dps because when you fight with him you do not have enough armor so you will day fast in team fights so adding thornmail will help you deal some more damage.

the runes you need are above you need armor pen so you can do damage to them

you should buy the cloth and the 5 hp pots and and not go back till you got blue buff. then get your long sword and 2 more hp pots. now go and kill every thing on your side and red buff. by now you should do a gank soon to. go and get your bow. then soon after you will gank some more and get blood razor ect.

PROS
he heals as his passive and does 120% damage and splash
he has fear
great ganks
dusk bringer applies 55 damage at 5
CONS
weak without any resistance
usally gets targeted because of his damage output

you can choose to jungle which is this build ill have a lane one soon. but jungle go gobs, wraiths, wolves, blue buff. then recall. go back to gobs, wraith, wolves, red buff. then soon you can go to there side and do the same thing but you need to gank when you get blue and red buff with your ult.

have you team let them push on you so you can use your ult to jump in dusk bring and fear then pop shield to so you can hit with your passive also.