Ivern vs Cho'Gath

Place your groves, then go gank while they grow: Friend of the Forest (passive) lets you free the camp without fighting it once the grove is fully grown.

After landing Rootcaller (Q), ping your team: allies who attack the rooted target dash into attack range, and you can dash to the target by recasting.

Cast Triggerseed (E) on the ally who engages: the shield explodes after a moment and slows enemies around them.

Recast Daisy! (R) to give her a target: her 3rd consecutive auto on the same champion knocks every enemy hit into the air.

Keep moving against him: Rupture (Q) strikes an area on the ground, and an enemy standing still takes a knock-up, damage and a slow.

Punish him when he goes for last hits: Carnivore (passive) restores health and mana for each unit he kills, and he lasts a long time in lane if you let him farm.

If you have range, keep your distance: his kit has no dash, only the slows from Rupture (Q) and Vorpal Spikes (E).

Don't stay in melee range at low health when Feast (R) is up: its true damage ignores your resistances, even if you're a tank.