I have:
4 Barracks and I was wondering when I boost them, how many should I do? 2? 3? All 4?
I have been doing 4 and whenever come back from an attack it is always ready.
Am I wasting Gems?
I like to go with these while i train:
Lvl 9 Barrack: All Barbs (60)
Lvl 7 Barrack: All Barbs (50)
Lvl 7 Barrack: All Archers (50)
Lvl 7 Barrack: All Archers (50)
Please tell me if you have any experience doing this. thanks for all your guys' help!

