Hey there, Since this is my first guide i don't really know what to tell you, but i do know this, This build is extremely hard to get killed against and it leaves you getting triple kills every time you're in a 2vs3 fight Anyhow read on to find out more

[+] Very high amounts of damage
[+] Stealthy so can roam around looking for easy kills
[+] Very good jungler if you need that extra cash
[+] Great for harrasment

[-] Can be very squishy without her ultimate

The runes for this build are quite unusual compared to other builds, The Armour gives you a good advantage fighting melee champions and the magic resist gives you a good advantage against those annoying AP champions that get in the way, And the magic penetration on top of the boots you will build using this build does a hell of a lot of damage in quick bursts and the spell vamp is to keep you alive whilst ganking lanes and taking one champion at a time

Farming on eve is very VERY important, With eve you need to get all the farm you can to sustain her build, admittedly you will get the money from champion kills when they are trying to roam about the alters and trying to gank your team.

With evelynn her passive Shadow Walk it is very good to gank with but also mixing this up with dark frenzy will help you to gank and chase down enemy champions and do some serious damage with
Agony's Embrace and then the slow from that will give you a great advantage to catch up to them and earn a triple kill

You can also use this build on 5v5 you will just have to buy the 5's equivalent to the items.

Thanks for reading this guide and i hope it gets you all the wins you need.. Hopefully ill make another build, But until then Happy Gaming!