I was just about to start a thread pretty much exactly like this. It takes a truly absurd amount of DE and builder time to max out heroes, I doubt anyone has done it yet without gemming, but the end result is a unit that you almost never get to use unless you are willing to spend even more gems to instant heal. If supercell were to leave the heal time at 60 min for all levels they would probably see a huge rush of people spending gems to start leveling heroes up. Max level heroes will still be a paying customer only item, just like maxed walls at TH 9, but it would at least give us non whales a reason to actually want our heroes leveled up.

