Soraka vs Nami

Hit a champion with Starcall (Q) before Astral Infusion (W): Rejuvenation heals you, lowers the heal's health cost and passes to the healed ally.

Get to your wounded allies quickly: Salvation (passive) makes you run faster toward them.

Place Equinox (E) under an enemy who is channeling: the zone silences them, then roots champions still inside at the end.

Save Wish (R) to rescue an ally anywhere on the map: the heal is stronger on allies below 40% health.

Change direction when she casts Aqua Prison (Q), then step up if she misses: it's her only stun outside her ult, on a 12 to 8 second cooldown.

Avoid trading when she casts Tidecaller's Blessing (E) on her ally: their next autos and abilities slow you and deal more damage.

Step out to the side of Tidal Wave (R): it travels a long way but moves slowly, and its slow lasts longer the more distance it has covered.

If you can engage, target Nami when she steps up: with no dash or leap, she can only walk away.