Re: How should Superman fight?
He's incredibly powerful and has pretty much no formal combat training, at least until he joins the League and meets up with suoer powered trained fighters like J'onn and Diana, and that's usually a very dangerous combination. So I would imagine that his fighting style would be very, very defensive, capitalizing on his speed and ability to take a hit, unless it was against someone who he simply had to unload on. That is, if he's aiming to not kill anybody.
The world does not work the way you think it does: