So I've been having literally 0 mana problems with Ekko
With my favorite mana-using mids, I can't get away without a mana regeneration/flat mana item. I simply must get one, or else I risk running OOM during crucial moments.
With Ekko, I just don't have that problem. Spam spam spam all I like and it never seems to get me dangerously low on mana. Seems a little silly. Like, ok, you decide not to give his ult a mana cost. That's fine, I guess, but if you're going to do that, shouldn't his regular abilities have high costs to compensate?