Aphelios vs Nilah

With Gravitum as your main weapon, hit your target to slow them, then cast Weapon Abilities (Q): the cannon roots every enemy it has slowed.

Switch to the right weapon with Phase (W) before Moonlight Vigil (R): you then attack each champion hit with your main weapon, and its effect applies.

Before an objective, check Weapon Queue System (E): it shows the weapon Alune will give you next, and an empty weapon goes to the back of the queue.

During Jubilant Veil (W), don't attack: she dodges all autos, and so do the allies she touches. Wait for the mist to fade.

If you're ranged, poke her outside Formless Blade (Q) range: she fights in melee and only gains range after hitting with this spell.

Watch her level in lane: Joy Unending (passive) gives her more XP from minions, so she can have Apotheosis (R) before you hit level 6.

Move away as soon as she casts Apotheosis (R): she strikes around her for 1 second, then the final strike pulls nearby enemies toward her.