As zilean, Pre-six he is quite squishy, and easily killable if his p is on cooldown. This also makes him vulnerable to crowd control, especially when he is trying to poke with his Q.

His Q is quite telegraphed and he can be easily punished once his Q is down. Again, his Q can also be dodge by blinking/dashing away from the drop point of his Q.

He is pretty much a poke/damage bot when his Ultimate t is down. Zilean is inherently squishy so it should not be an issue to take him down once his Ultimate t is on cooldown. As zilean, Before six it is rather squishy, and easily killable if its p is on cooldown. This also makes it vulnerable to crowd control, especially when it tries to poke with its Q. Its Q is quite telegraphed and it can be easily punished once its Q is down. Again, its Q can also be skipped by flashing / moving away from the point of fall of its Q. It is rather a poke / bot of damage when its Ultimate t is down. Zilean is intrinsically squishy so it shouldn't be a problem to shoot it once his Ultimate t is on cooldown.