It depends if the team is of full health yes start killing as well. Or if you have a second healer and then whip it out. But for me I honestly just use it to heal or damage boost now days.
Fight me I’ve gotten potg using pistol while ultimate. I’ve done over 10k healing and done more damage and killing than dps in some of my games. Usually it’s just a shitty team but if it works it works and I’m not fixing something that ain broke.
I'll use the pistol only to help my team mates finish off low health enemies, especially if they're running away. I tend to switch between heal, damage boost, and pistol throughout Valkyrie as needed
>two teammates are down because of the Widow behind
>calls out Widow
>nobody gets her
>Valks and revives two dead teammates
>pulls out pistol and kills the Widow no one would kill
>win game
Sometimes it's ok to pistol because you can easily get that pesky hanzo or widow who has your team pinned down. It's all about situational awareness. You can't blanket yell at all mercys. You aren't in their shoes, you don't know what is on their mind.