Well firstly he can be, but his main place would be as a forward. (Shin seems to think he has better battle tactics, and being his creator I agree with him). Which is kinda like what you said but even more so.

[u]Forward:[/u] Charging forward into the heat of battle the forwards are the first to engage in combat, breaking through enemy defense lines unaided by any supporting units. The forwards all possess large destructive power but maintain a balanced defense for long sustainability out on the battlefield.

Secondly he won't be telling her to aim at anyone, nor will the rifle idea be used at all. >.<