Xerath vs Azir

Charge Arcanopulse (Q) to poke from long range: its range grows with the charge, but you slow down by up to 50% in the meantime.

Slow your target with Eye of Destruction (W) before Arcanopulse (Q): the center of the zone slows the most, and a slowed target dodges poorly.

Land Shocking Orb (E), then center Eye of Destruction (W) on the target: stunned, they can't dodge it, and the center slows the most.

Cast Rite of the Arcane (R) to finish a fleeing target or support a distant fight: your shots reach 5000 range, with bonus damage per champion hit.

Stay out of range of his soldiers, not just of him: each Arise! (W) soldier attacks nearby enemies in his place.

Play hard before he hits level 6: without Emperor's Divide (R), he can't knock you back, and Shifting Sands (E), his only dash, has a 22 to 16 second cooldown.

When he has Emperor's Divide (R), spread out from your allies: the soldier wall knocks back every enemy across its width, then blocks the way.