I keep a list of all of the monsters that I have ranked up, but not feed to those ranked levels. I do this with the idea of slowly getting to them with the idea that it will help my overall production. So at this point, I have 35 monsters. They are all C to E. None of them are legendary. The reason for that is that I deliberately rank up legendaries, whereas everyone else is usually accidental. Like my last Hedgy that I am extracting. I don't need him to rank my one Hedgy to 5*, but maybe one of my teammates might want the cells?
So what are your "First World" problems?
Note that this is not a serious gripe thread, just a place to have fun talking about the issues we run into. It might even help some of us to avoid some of these problems.