The choice of starting equipment: Corruption Potion, because Ekko’s main output is skills, and the early push is also dependent on Q, so the mana is still scarce, and the Corruption Potion can restore his own blood while still retaining mana!
Early three-piece set: Ninja Footspan + Lich's Bane + Push Stick
I think the first big item should be Ninja Footsteps, because it would be too risky to cast Radiant Light first, because Riven's damage is too high, and you don't even need to use a big attack to hit your ultimate move, so Ninja Footstep can very well restrain the damage of Riven QA, and it will also increase the movement speed and create a movement speed difference! Next is Lich's Bane. Lich's equipment is more compatible. It increases the burst of E and the damage of Q, and also reduces the cooldown, so it is more compatible! The push stick is a piece of equipment that matches Ekko's burst. It can increase health and cooldown reduction. It provides better damage output and also has a good health bonus!
Later three-piece set: Langton's Omen + Central Asia + Banshee's Veil
In the later stage, the main focus is on life-saving. For Lan Shield, it is the most compatible equipment for resisting ADC's critical hit damage in the later stage. Zhongya is a life-saving artifact that enters the field because it increases magic power and armor by 100%. With a cooldown of 10, when paired with Lich's Bane and Push Rod, the CD can be nearly full. Later, when there is Banshee's Veil, it can be superimposed with full CD, magic resistance and spell power. Whether it is a solo capture or a team fight, the output and You have both resistance and resistance!