Rammus should leverage his high gank threat and taunt CC to punish Nocturne's overextended lanes before he hits level 6.
This matchup is a scale-vs-snowball jungle duel where Rammus must avoid early full clears and instead prioritize early pressure and cross-map plays to offset Nocturne's faster clear and level 6 power spike.
Jungle Plan
Path toward overextended AD-heavy lanes to use (Q) and (E) for fast ganks before Nocturne hits level 6.
Fight for river control and Scuttle when your lanes can assist, denying Nocturne's access to early dragon and Rift Herald.
Counter-gank Nocturne's post-6 ultimate ganks by tracking his position and collapsing with teammates to punish his isolated picks.
Danger windows
Beware of Nocturne's level 6 ultimate gank windows, especially on low-vision side lanes where he can isolate targets.
Avoid isolated river skirmishes early where Nocturne can use (W) spell shield and (E) fear to win duels.
Be cautious contesting objectives without lane priority, as Nocturne's strong objective control and dueling can force smite fights.
Early game
Start with a three or four-camp clear aimed toward lanes with priority or overextension to set up early ganks.
Contest first Scuttle only if nearby lanes have priority to avoid risky 1v1s against Nocturne's stronger early dueling.
Avoid full clears early to reduce invade risk and focus on defensive wards to spot Nocturne's pathing and ultimate gank angles.
Power spikes
Rammus's power spike comes from landing (E) taunt on carries, enabling impactful ganks and teamfight lockdown.
Nocturne spikes at level 6 with (R), so Rammus must respect his pick threat and avoid isolated river fights post-6.
Rammus scales into late game with armor and taunt value, increasing his impact against Nocturne's AD damage.
Win conditions
Convert early gank pressure into lane priority and secure Scuttle vision to deny Nocturne safe farming and objective setups.
Use Rammus's taunt CC to lock down Nocturne or his carries during teamfights, leveraging your anti-AD scaling.
Punish Nocturne's post-6 overextensions by counter-ganking and forcing objectives when his ultimate is on cooldown.
Tip: For Rammus vs Nocturne, read overview, trading pattern, and danger windows first for a fast Jungle lane check.