So, there is another recent thread here in the forums about RNG being evil or some such, because random hero boxes gave a lot of dupes. I'm new here, but I can't imagine that that is the first thread blaming RNG. And while we do have the general "buy random boxes until you have half the roster" advice, we also have tools like this spreadsheet where you can factor in things like cost, who you really want to get and more.
Still not enough. So, how about we force people to watch the video below before each and every buy of a random box*? :D
*Not a serious suggestion, I just love numbers and stuff and grab any opportunity I can to post this video.