Hunting
I suggest always hunting when your troops are not in use. Because scouters could easily find you and attack you, if it's a hidden attack, and you don't notice, you'll have to fight and probably loose your army. You could back down from a fight for 5 coins but to be honest it's a waste of coins. Plus if you hunt you could get money or items. But most importantly it'll protect your troops while your away or if you arn't using them. The maxium amount of hunting time is 90hours, when it reachs 90hours your troops will call back automatically. So don't just leave them to hunt. Once you think you've hunted for a decent amount of time (9-12hours) you can harvest and either you'll get nothing or something so its a 50/50 chance.
Good luck hunting.
Good luck hunting.