Use Nocturne's efficient full clears to hit level 6 on schedule and unlock strong map pressure with (R).
Manage river control carefully to contest Scuttle only when nearby lanes have priority to avoid multi-lane collapses.
This is a snowball vs control jungle matchup; Nocturne must leverage level 6 picks to create objective advantages before Nunu & Willump's utility scales.
Jungle Plan
Prioritize full clears toward level 6, then use (R) to punish overextended lanes and convert picks into dragons or Herald.
Track Nunu & Willump's pathing to counter-gank his early ganks and avoid his fogged (W) engage angles.
Invade only when lanes have priority and Nunu is on the opposite side of the map to deny his objective setups and scaling.
Danger windows
Beware of Nunu's early (W) knockup ganks from fog; keep river entrances warded to deny surprise engages.
Avoid isolated river fights where Nunu can use (Q) sustain and (R) zoning to force bad smite fights.
Be cautious contesting objectives when Nunu has lane priority and can start dragon or Herald quickly with (Q) and Smite.
Early game
Start with a full clear path to reach level 6 quickly and maintain objective access.
Avoid early isolated fights before level 6 since (Q) sustain and gank threat are high.
Contest first Scuttle only if your lanes can move first and prevent Nunu from using (W) angles to engage.
Power spikes
Nocturne spikes at level 6 with (R) for global picks; use this to force numbers advantage and secure objectives immediately.
Nunu & Willump's first dragon or Herald spawn is a major spike; convert successful ganks into immediate objective starts before he can react.
Respect Nunu's level 6 (R) zone control in fights; layer your engage after his CC or allies' crowd control to avoid being locked down.
Win conditions
Use Nocturne's faster clear and level 6 picks to create cross-map pressure and force Nunu & Willump into reactive play.
Convert picks from (R) into immediate dragon or Rift Herald control to snowball map tempo and deny Nunu's objective leverage.
Track and counter-gank Nunu's early ganks by coordinating with lanes to punish his lower dueling strength and secure vision around river.
Tip: For Nocturne vs Nunu & Willump, read overview, trading pattern, and danger windows first for a fast Jungle lane check.