User blog comment:I'mWithTheGuyWithTheShirtThatSaysI'mWithStupid/Silverclubbing Experiment/@comment-70.192.67.37-20160123003821

The results of an all Cossack hanger between bronze and silver will just be that getting less gold due to your team losing more often due to you not contributing your share of fighting. You'll get 5 gold when your team wins, but it will just be less wins overall.

You won't need 5 Cossacks though - as you'll be probably on the 2nd or 3rd Cossack only when the enemies dominance bar goes to zero.