This is a difficult stat-check lane where Nocturne's kit naturally counters your engage patterns. His spell shield can negate your primary damage or gap closer, and his tether forces you to use your mobility defensively rather than offensively. You generally want to avoid direct 1v1 fights unless his key defensive tools are on cooldown.
This is a high-stakes hunter-vs-hunter matchup where whoever gets the jump usually wins. Rengar dominates the early game through bush control, but you out-scale in teamfights and can kite him with if you don't get 100-to-0'd instantly. In the jungle, your packmates can occasionally soak a stray or confuse his target selection.
This is a battle of persistence versus trickery. You win by landing and letting your pack harass him, while he wins by baiting you into or backstabbing you with . Keep your distance and use your range advantage.