Galio vs Nami

Engage with Justice Punch (E), release Shield of Durand (W), then place Winds of War (Q) during the taunt: the tornado deals damage based on max health.

Against a magic-damage opponent, don't take free hits before a trade: after a few seconds without taking damage, Shield of Durand (W) gives you a magic shield.

Charge Shield of Durand (W) before releasing it, after a Flash if needed: a longer charge means a longer taunt, more damage and a wider area.

Watch the map and join fights with Hero's Entrance (R): your allies in the area get a magic shield, and your landing knocks enemies into the air.

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.