Assassins are supposed to have good poke and wave clear right?

As much as I hate Zed, I have to admit he has his weaknesses. He specializes in killing single targets, much like , and most targets cannot survive his burst. However, it's because of this that he falls off pretty hard once fights turn from small skirmishes to 5v5 teamfights. Which is why he splitpushes, to try and force a 1v1.