is a Heavy AP champ that relies on timing of abilities and ability to execute quickly.

Stats:

Movement Speed: 345
Attack Range: 125
Attack Speed: ~
Attack Speed Growth: 3.5
Base Damage: 59
Damage Growth: 3.5
Base Armor: 27
Armor Growth: 3
Base HP: 580
HP Growth: 80
Base Mana: 280
Mana Per Level: 40
Base Magic Resist: 32
Magic Resist Growth: 1.25
Base HP Regen Per Second: 1.8
HP Regen Per Second Growth: 0.18
Base Mana Regen Per Second: 1.2
Mana Regen Per Second Growth: 0.16

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Reason For Full APoH:

All of his abilities are AP based, late game this can be used to the max if you use items such as Lich Bane, Nashor's Tooth, and Luden's Tempest that do on hit bonus AP and damage because Z-Drive does a massive amount of damage. I understand he is not a mage, but rather a AP assassin. This is why APoH works.

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Abilities

Passive: Z-Drive
Every third attack, or damaging spell on the same target, deals 15 + 12 per level (.7 AP) bonus magic damage and slows it by 40/50/60/70/80% [at levels 1/6/11/16/18] for 2/2.5/3 seconds [at level 1/6/11] (cannot be triggered on the same target more than once every 3 seconds).
If the target is a champion, Ekko gains the speed for himself.


Timewinder (Q):
60/70/80/90/100 Mana
11/10/9/8/7 sec Cooldown
Ekko throws a device that deals 60/75/90/105/120 (+0.2 AP) magic damage to enemies it passes through. It expands into a slowing field on the first champion hit, slowing everything inside by 32/39/46/53/60%. It then returns to him after a delay, dealing 60/85/110/135/160 (+0.6 AP) magic damage to all targets hit upon return.


Parallel Convergence (W):
30/40/50/60/70Mana
22/20/18/16/14 sec Cooldown
Passive:Ekko's basic attacks deal bonus magic damage to enemies under 30% health equal to 4% (+1% per 35 AP) of their missing health (max 400 damage vs. minions and monsters).
Active:After a 3 second delay, Ekko creates a short-lived chronosphere at the target location that slows enemies who enter by 40%. If Ekko enters the sphere, he will detonate it, gaining a shield that absorbs up to 150/195/240/285/330(+.8) damage for 2 seconds. Enemies caught inside are stunned for 2.25 seconds.


Phase Dive (E):
40/50/60/70/80 Mana
15/13/11/9/7 sec Cooldown
Ekko dashes a short distance in the targeted direction. His next attack will deal 50/80/110/140/170 (+0.2 AP) bonus magic damage and teleport him to his target."


Chronobreak (R):
No Cost
90/80/70 sec Cooldown
Makes Ekko invulnerable and untargetable, and teleports him back to wherever he was 4 seconds ago. Ekko heals himself for 100/150/200 + 20/25/30% (+1% per 30 AP) of the damage taken over the last 4 seconds, and deals 200/350/500 (+1.3 AP) magic damage to all nearby enemies on arrival.

W, Q, E. By time this sequence is over they should be stunned inside your W and you can finish them off.

Pros:
Does a TON of damage late game
Has pretty good AP scaling
Amazing in team fights

Cons:
Builds slow
Tough early game
Low sustain Pre-Six