https://www.mobafire.com/images/summoner-spell/ignite.png - Take Ignite when you're confident you can kill your laner single handedly. This is my go-to summoner.

https://www.mobafire.com/images/summoner-spell/teleport.png - Take TP if feel like you are going to get poked very hard , so you can TP back to lane and not lose farm.
TP is also good for making plays bot/top.Consider it.
- This is simply a must have.

Try to abuse your passive early in laning phase. It is very easy to trade with it as you get a lot of movement speed. You can proc your passive and easily run out . Also , consider doing level 3 W vision cheese which I will show further down the guide.
Ekko isn't strong early so don't expect much. Unless you have ignite.