I’m not sure using only the first four really helps here - third one is great if you need citizens, second one if you need peacekeepers, first and last for hunters or soldiers, but leaders and rebels are difficult and have low drop rates (<= 25% on all training courses). And most contain citizens, which are plentiful anyway (they have so many 1*). So you end up wasting food, gear, and survivors producing citizens that are barely useful, and sometimes other types that you have no use for. The only one that is really good is the third one (75% peacekeeper, 25%leader), and that one will empty your shirt supply quickly. Plus, the persona-specific courses have a chance to give you persona trainers, which are worth a lot of supply points (one of them is enough for almost 5 world cans, that’s a lot of shirts and gloves).