Well, as you might have noticed if you had seen my project, all my heroes have icon sets that match each other, so that means 5 (or sometimes even more) icons per hero. I don't create a hero ever other day though, more like ~monthly, so I think it's pretty acceptable.
I know what you're talking about though and I can totally understand it, university drains like most of my free time too. I had to stop making heroes anyways as my old icon maker left without a single word, and I won't rely on the icons in the section, I want unique, set ones.