Chroniss, my way to deal with this was => the leading char was in peace mode, the other in aggressive combat mode with drawn weapon. A bit dangerous, depending on where I was.
Another way I did was this: Instead of clicking the chars to spot "A" I kept my mouse pressed and sort of lead them around. Picking up stuff only with ALT as "safety target".
I agree fully, automatic attack on weak creatures should not be possible. I had to reload a lot.
Kiya