Nocturne Top is now a thing.

Lethal Tempo Triumph Alacrity Coup de Grace

Manaflow Band Celerity

With Manaflow Band, Nocturne is no longer repressed by his mana pool. You can actually cast things, and trade in a lane. His wave clear is phenomenal. Position your self to maximize the sustain of your passive.

once you hit level3, start looking for the kill. Land your Q, tunnel vision onto your target, fear them....Tempo kicks in, in conjunction with the attack speed bonus from your spell shield, nearing attack speed barriers 3mins into the game. So, youre reaching like 100% attack speed at 3mins, that combined with the bonus AD from your Q, combined with Celerity gaining damage from the movespeed on your Q, later combined with Black Cleavers move speed gains makes it impossible for anything to trade with you If you land your Q.

The only champ Id be concerned with 1v1 in top lane, would be Jax.