Hack squish/tank. If tank deal as much damage before having to leave if a squishy make sure you can kill them. Also utility hacks and upkeep. Like on Anubis point b, volskaya point a etc.
I’ve been doing really well with her. Since her latest update I focus more on countering the other teams healers and dps by hacking them the second they get out of position or over extend.
It’s absolutely lethal to the other team and gets them trickling. Then coordinate your emp with someone else’s ult so they can’t counter it and boom.
The new Sombra should be played diff than old Sombra. Old Sombra is basically hack the packs and have your team play around them for fast EMPs and team wipes. New Sombra is basically hacking as many targets as you can and playing her like a stealth assassin. Prioritize supports (mostly Lucio/Zen) and tanks for easy kills.