Thanks all. Sorry for so many questions.

How best do you power train players? Do you train them individually or by zone or entire squad? Do you train a player until he is exhausted and then restore with green packs and just do this over and over again until he gains percentages and stars? And then do same with the next player? At the moment I concentrate on keeping team bonuses at 10% rather than looking at individuals. Am I doing this wrong way around?