Hello I'm Voldemortas from EU west region and here is my Nocturne's build. My main and most favorite jungler is Nocturne, because it has nice running and catching spells and a long range ultimate that can change a team fight into a victory by killing their AD or AP carry.
Here I'm going to tell you how I play Nocturne, choose spell combinations, runes, mastery and why I'm choosing them.
Nocturne is a strong off tank that is best played in the jungle because his Dust trail goes pass everyone and grants you great AD to make your Passive give you extra hp.