Evelynn is not as weak early game as people think. With her Q buffs, she can reliably deal damage and makes her pre-6 ganks amazing. After she reaches level 6 and gets full stealth, however, she becomes a monster. The pure pressure you put on the other team that you could be anywhere on the map makes for amazing mind games. if you are playing against Eve, BUY PINK WARDS. They reveal her through stealth and counter her completely. As Eve, if you see a pink ward, ping it but DO NOT BREAK IT. The time you spend breaking it is too long and Eve is all about using her time effectively. It gives vision of you the entire time and the enemies will be able to make a play on the other side of the map. Just find a path around the pink ward so the enemies don't know where you are.