This is the build I use, it isn't that prefect burst AP ekko you see mid, but I can fight against the very tank meta face to face.

For me it tends to be a much more balanced build for every game instead of those assassin games. If you want to be a burst AP assassin go back to leblanc, she is better at it by far.

I start with crugs using my W for the stun (shield wears off before stun) and smiting immediately after the stun wears off so that i can stun again.

Quickly move to red using Q and ducking into the brush and then W again for another stun. pulling into the brush makes it easier for the next Q to hit all three jungle mobs. Also better for catching counter junglers moving in on you.

Then I rush all the way to blue and same basic tactics as before.

at level 3 you should have all 3 abilities which means you can gank top or mid easily, if there isn't a good opening just keep killing or back. (I can usually hit all the little camps on the back swing if i dont gank)

Ganking- I W from the brush or fog toward where I believe I will make contact with the enemy I want to kill first. If all goes well my second dash from E will hit him right as the W zone touches down. If the stun hits it should be a free kill. If not Q for dmg and let up so you dont give up a kill.

I'm keeping it short for now. If i get enough comments and feedback I'll update. Try to keep it positive. I am doing this to get Ekko's name out of the mud. I love him and I'm tired of the hate that he has been given so far.