Good god, keep it to one thread. And to answer your question, I slap them in the back every time they shoot. When you hit them their weapon arm flies everywhere and they can't hit jack. They'll die soon enough.
I make sure not revive them if and when they go down and I dont heal them if I happen to be the healer in the match --- Chapter 7, that's all you need to say to a Valkyria fan, they'll know what you mean-Celestial Damnation (see quote)