Fiddlesticks vs Lillia

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.

Against Blooming Blows (Q), stick to her or back out of range: only the outer edge of the zone adds true damage.

Get out of the center of Watch Out! Eep! (W): the zone deals much more damage there than at the edge.

Dodge her spells, even Swirlseed (E), which rolls to the first enemy: each one marks you for Lilting Lullaby (R), which puts every marked enemy to sleep.

If you have CC, use it on her: with no dash, she relies on the move speed Blooming Blows (Q) gives her for each spell that hits.