Suggestion for Ekko
It might be op but I'm just putting it out there:
Usually when I find myself in a team fight or something close to a team fight I find myself somehow almost half way out of mana, yes I know its my fault but Time Winder is just the ultimate poke, and when I see my illusion where I want to land it I'm afraid to actually use it because I dont want all my mana to be wasted even if i do land it. So I think if you correctly land your R and actually do some damage to enemies, you should get back half of your 100 mana you lose.