FiddleSticks vs Nocturne Jungle Matchup
FiddleSticks Jungle wins 50.1% of 1,069 Low Elo games against Nocturne Jungle, -0.3 points vs expected, 2-patch window 26.19-26.20.
Researched on LoL patch 26.20. Tips are written to hold at any rank; stats come from Low Elo ranked games up to patch 26.20.
How to play as FiddleSticks
If Nocturne is holding Shroud of Darkness(W), land Reap(E)'s center silence first to draw the shield, then use Terrify(Q) after it is gone; the matchup thread recommends this spell order.
Avoid meeting Nocturne alone; track where he is likely to use Paranoia(R) and counter-gank that lane, since players in this matchup recommend avoiding the first solo engage.
Reap(E) silences only enemies hit in the center of its slash, while Terrify(Q) is a separate fear spell; Nocturne's Shroud of Darkness(W) can block only one ability.
How to play as Nocturne
Use Paranoia(R) as Fiddlesticks is setting up Crowstorm(R); Fiddlesticks players report that the loss of vision makes it harder to choose where to land the channel.
Sources
These notes come from r/FiddlesticksMains, checked against the champions' abilities.