New E damage to monsters

I feel like no one has brought up how garbage the new E damage on monsters is. Unless you are going AP (probably troll) it does 160 magic damage max magic on a 10sec cooldown which is less than an auto. Phreak’s video said it could be used for smite combo to secure objectives. Not only is it low damage but it also has a cast time which makes it pretty bad for smite combo and you put your taunt on a 10 sec cooldown.

Overall it seems like you should never be using your E on monsters. And it feels like it should have an execute or more damage attached to make it actually useful for smite secure.