How to use your skills and combine them:

So i'll tell you my tactic.I always my first skill Duskbringer to attack the enemy,to escape because it gives you movement speed.Then,my 2nd skill Shroud of Darkness.You can use it to block some skills effect like stun,snare and the others,but never use it to block damage or something like this because it doesnt reduce damage.My 3rd skill,i use it to fear someone.You use it to ctach someone whos running,because it fears the enemy and deals damage overtime.You can use it to escape from someone.Fear the enemy who's trying to catch you.And finally my ultimate.This skill will make the vision for the enemy impossible,because its making dark on the map,but additional you can go on the enemy with the ultimate at level 1 the range is very small but at 3 it's way bigger.You can use it to catch the running enemy or to escape.U can easily escape because the enemy can't see just a little bit.Or use it to save to save an ally while hes running from the enemies.Anyway,When u go one someone with the ultimate,always use the 3rd skill to make sure he doesn't escape and then use first skill to buff yourself and then 2nd skill to block stuns,snares and the others.

Jungle Route:
-Blue
-Wolfs
-Wraiths
-Red
-Golems

Normally,after u finish this route go and gank bot/mid lane but before u go to gank the enemy you should tell your allies to let the enemy push so you can come and gank very easy.If the enemy is going to push and u just catched him he will die or escape but when he will come he will be without flash,ghost,heal or something else.And the guy/guys on the lane can farm without a problem.

So when i play Nocturne jungle,I start with cloth armor and 5 health potions.After i finish the jungle and gank some lanes i go base and buy boots and speed and wriggle or madred razor if you don't have enough gold.After i finish wriggle and boots i buy a Brutalizer and Phage.After this u complete Yomumu,buy a Chain Vest and complete Frozen Mallet.And don't forget to use Yomumu when u start to fight with someone.After this I buy a thormail so I can easily battle with meelers and after this I buy a Bloodthrister so I can deal more damage and get my life back way faster and then Wit's End so I can resist to magic damage.

And this is how i usually play Nocturne,The Eternal Nightmare