Jinx vs Kog'Maw

Poke with Fishbones, the rocket launcher of Switcheroo! (Q), for its range and splash damage, then swap back to the minigun for long trades.

Fire Zap! (W) to kite the bruiser running at you or catch an enemy who's fleeing: it slows and reveals the first enemy hit.

Throw Flame Chompers! (E) in the path of their engage or their escape: they root the champion who steps on them and last 5 seconds.

In teamfights, focus the lowest-health target first: each takedown triggers Get Excited! (passive), a big boost to attack speed and move speed.

Fire Super Mega Death Rocket! (R) to finish a fleeing enemy rather than to start a fight: its damage grows with their missing health and over its first second of flight.

Engage when Bio-Arcane Barrage (W) ends: his attack range drops back to 500, and the spell has a 17-second cooldown.

If you can engage, go for him: with no dash or leap, Kog'Maw can only back off on foot, and Void Ooze (E) is his only slow.

Below 40% health, get out of range of Living Artillery (R): each shot then deals its max damage to you, and it reaches very far.

When he dies, move away from him: Icathian Surprise (passive) makes him explode 4 seconds later, dealing true damage to nearby enemies.