Not everyone has the time to use all 50 troopers by doing battles even in auto mode in the highest speed. Or doing battles just to farm. It takes a lot of time. It would be useful to people with limited free time to have the option of instant battle for levels that where previously completed and three skulls earned. You choose your team, your trooper and just click the instant battle. The boss fights could ( and should ) be excluded. This would also minimize the problem where people don't use all troopers. So, what do you think?