Pros- such a fast jungler

2 escape abilites (imo) your E and Q

always nice to scare your enemy team with your ulti :P

farming - is fast especially with your passive..

Solo Play - he dominates solo
Teamwork - even more badass than solo

cons- its kinda anoying when your playing against morg (insta ban ussually)
but she can snare you and its a gone kill ( same as kassadin level 6 )

kinda quik mana problem
he needs to farm alot and quite alot skills for his items...

Too be honest id rather have attack speed quints than att dmge because it gives me a little faster jungling progress..

You should probally know why (im sorry im not good with talking/typing)

I'd rather have flash instead of ghost
its nice it gives you the extra movement speed but with duskbringer you shoulnd have a problem
escaping/chasing...

now back to chasing some enemy's will flash over the wall and with duskbringer+ghost you woulndt even make it because you lose sight immidiatly and might go the wrong direction,but now you have flash yourself you can hop over and keep following them and if your flash is on cooldown your support should of placed wards around half of the map (and if your lucky your chasing someone close to wards) so if its on cooldown and you can ulti him than do it, it doesnt have that long cooldown..

I always start with wolves and then go to blue,after that i go to wraiths, and fly my way over to red buff, and as last i get the golems and you should check your minimap quite often especially if you want to gank alot..
if you dont see a way to gank top or mid then counter jungle the enemy but carefull tho you never know if there's a tiger or wolf in the bush :)

why double bloodthirster?
because of the great lifesteal + the bonus from farming
armor pentration - only your unspeakable horror does magic damage the rest does physical including your ultimate (paranoia) and if im not mistaking your passive does physical damage too
soo its always nice to have a extra armor penetration...
Latern - 1st off all the free ward every 3 minutes early lifesteal+armor and the 20% too deal succesfully 425 magic damage (only on monsters/minions)
infinity edge - the damage :D + it let you deal your crits 200% (and the crit change ofcourse)
berzerker greaves - well for the attack speed ofcourse...
merc threads - i only have this if there are atleast 3 heavy cc in the opposite team.
Phantom dancer - pure because of the attackspeed + crit change.

you dont really need teamwork with this build but you never know if the enemy is close too with someone else.. so just keep close behind your team in teamfights (they will always focus you first) because of the damage you do.. and your kinda squishy..

its not hard to gank with nocturne like i said i ussually gank top if they pushed to far
but when your about to gank
trow your Q out then E on them and keep attacking them..
if you do it right its a guaranteed kill..

Im sorry but this is my first build and im not so good with talking/typing so much anyway
but i did my best

hope you guys like it..
and please tell me what i could improve

and sorry again if you cant understand something because english isnt my native language