Fiddlesticks vs Shaco

Channel Crowstorm (R) out of their vision, from a brush or behind a wall: if you're unseen when your spells hit, Terrify (Q) fears them too.

Aim the center of Reap (E) at the key target: in the center, they're silenced; at the edges, only slowed.

Channel Bountiful Harvest (W) to the end on camps and minion groups: you heal for part of the damage, and the remaining cooldown drops by 60%.

Place the effigies from A Harmless Scarecrow (passive) in key brushes: they replace your trinket, and Terrify (Q) can fear when you're mimicking one.

Back before your health drops too low: below 30% health, Two-Shiv Poison (E) deals much more damage to you.

Move away from the Hallucinate (R) clone before it dies: it explodes and spawns three boxes that fear nearby enemies.

If you can reach him, focus him when he engages with Deceive (Q): he no longer has it to escape, on a 13 to 11 second cooldown.

Ward near his camps and at the entrances to your lane: spot him before Deceive (Q), which makes him invisible for his gank.

Move carefully in his jungle: Jack In The Box (W) goes invisible, fears the champion who comes near, then shoots nearby enemies for 5 seconds.