I play a few months. It is a lot of not clear and consequently often I read a wiki. As it turned out for the development of strategies and the selection of the team, there are corresponding missions in which it is possible to hone these or other combinations in terms of speed, defense and attack, and use of equipment. But this takes time, which is not already due to the events and the upgrade of the characters, or to sit for days like Koreans.
For example - checked the effect of equipment in real combat - the result - it does not give an effect, here and think what to do. go special mission until there is no time, you need to collect 50 manyu for the unit (with my speed of passage it's horrible).