your Q gives you the most raw damage so you start with that. Then your e to make it easier to kill blue/red. Then your e for faster jungling and to stay on targets.

The ganks are pretty straight forward. But I would advise just hard farming until you have at least your devourer. He has fast clear speeds and is able to stay fairly healthy in the jungle.

What your job is in the mid game after you have tri force is to flak and kill the enemy adc. You will have good burst at this point and if you get in trouble or go too deep use your r to get out quick. In the late game you get tanky! This allows for you to go in first. Focus the closest squishy you can get to.

This is where quite a bit of your damage comes from. It's why you want to rush into your devourer. As long as your lanes arnt doing too bad. STAY IN THE JUNGLE. As ekko you have some of the fastest clear speeds after about lvl 5. Don't be scared to use your ult for the heal/dmg to jungle monsters.

Pros: Fast clear speed. Once you have tri you can chase with your passive very well! Good damage early and gets tanky enough to survive to do that damage. He has great utility allowing for some sick plays.

Cons: You can be invaded on early, pre 6 hid 1v1 isn't good unless you hit your stun. His ganks are decent, but not great.

You want to use the hit and run tactic to avoid a lot of damage while still doing TONS OF DAMAGE. Using your q then instantly jumping in with your e to get the 3 hits apply your passive and tri force then run back! You are crazy fast if your q hits twice then your e because your passive and phage passive stack! So you can pretty much just kite anyone as long as you can dodge there cc.