Cass poison suggestion
So Cassiopeia is free this week and I decided to give her a shot. As a new Cass player I'm having one huge problem, using E on unpoisoned enemies. The little dots above their heads are really hard to see in a team fight, and if an enemy has left my poison cloud they have 3 seconds of me mashing E before I accidentally click it when they're not poisoned. In a team fight, if I E someone who isn't poisoned, I become a worthless champion who just stands there trying not to die until my E is back up.
TL;DR: can we get a better way to see poisoned enemies? Similar to how Braum's passive is very visible, or Nidalee's mark, it would help to not mess up using E in a team fight.