This is my first guide with a champion that i really like Evelynn i know that its not the best and i have a lot to learn till i know how to play her really good but for now that is i think the items i need to keep in late game help in ganks and save my team mates.Sorry if sth is not understood i don't know english very well.

Evelynn is a really good champ that many say that she should be played hybrid i agree with that but from my experiences i think that Eve relies on her skills and not in her attack damage so much and Ap eve can farm and get items faster than the hybrid eve or AD eve.After you have your 2 amplyfing tomes you will easily kill minions with 2 Qs and a basic attack.
NOTE for Jungle Eve you will need Smiteand Flash

i max Q first while taking some points in E as well cause that is your main stragedy to get kills. Before you have your ulti You use E to get attack speed and then you spamm with Q and basic attacks then another E.After you have your ulti Ap eve is really good you use your E then ulti to slow and gain the shield the continiusly use Q and basic attacks and you are guaranded to have a kill after you get some items.