Evade is a powerful ability that allows a user to teleport behind an opponent (or opponents) and consistantly deal damage. It's cooldown is rather short considering the ability and the time left open to hit the evade is rather long, which gives the assassin kit a large advantage over other kits, sheerly off of evade. It can be spammed, hit, generally used easily to defeat any kit, which for a set like itself is too broken. The assassin kit can already outrun and recover better than any other kit. To add to this, players can often use hacks in combination with this kit, which already gives it a lot of potential and is sometimes completely unnoticeable. A simple nerf to the evade can fix a part of this issue, as the rest of its abilities to my knowledge are balanced. A higher cooldown time and a limit on the amount of evades that can be made, I.E. 3, 4 or 5.