Use Diana's high clear speed to full clear and reach level 6 before contesting river objectives against Nunu's early gank pressure.
Focus on protecting your farming tempo and avoid early river fights where Nunu can leverage his strong objective control and gank threat.
This is a snowball vs control jungle matchup; use your burst and mobility to punish Nunu's isolated pathing and force objective fights with your ultimate.
Jungle Plan
Prioritize efficient clears and reach level 6 quickly to leverage your (R) for objective fights and skirmishes.
Contest Scuttle Crab only when your lanes have priority and can support you against Nunu's (W) gank angles.
Use your mobility to cross-map and counter-gank Nunu's early pressure, especially when he commits to ganks or objective starts.
Danger windows
Respect Nunu's early (W) snowball ganks from fog; avoid overextending without vision.
Be cautious during isolated river fights where Nunu can use (R) to zone and burst you.
Avoid low-health clears and forced Smite fights early, as Nunu's sustain and objective control can punish you.
Early game
Start with a full clear toward a safe reset unless a lane offers reliable setup for early ganks.
Avoid fighting for first Scuttle Crab unless nearby lanes have priority to support a counter-gank.
Track Nunu's early ganks and pathing to anticipate his river moves and avoid being caught out in isolated fights.
Power spikes
Level 3 unlocks your (Q)-(W)-(E) burst combo; use it to punish Nunu when he overextends or is isolated.
Level 6 (R) allows you to force objective fights and pick offs; track its availability to engage decisively.
Nunu's first dragon or Herald start with (Q) plus Smite is a strong spike; contest these objectives aggressively with your team vision and presence.
Win conditions
Use your fast clear and level 6 power spike to force fights around dragon and Rift Herald, leveraging (R) to control skirmishes.
Punish Nunu's early objective starts by counter-jungling when his lanes lack vision or priority.
Convert gank pressure into objective control by coordinating with lanes that can follow up on your engages and secure kills or objectives.
Tip: For Diana vs Nunu & Willump, read overview, trading pattern, and danger windows first for a fast Jungle lane check.