When going for this achievement do your teammates need to be injured when hitting 6 players or does it not matter?
I believe it has to be affecting them, so 7 targets simultaneously who are either getting damaged or healed by it? I’ve gotten it a handful of times over the years on a few long-gone accounts where I go for achievement hunting. Some, I got it instantly. Others, it felt impossible.
That’s actually a wonderful question. In recent memory, I got it on Busan Downtown, firing from the point upwards through the main choke. I had nearly my entire team in front of me and obviously 4-5 of the enemy team going through the choke. Some splash damage might have occurred because I don’t remember it popping instantly. Further advice is to shake the beam rapidly side to side just a little to attempt to register 7 targets.
Good luck! Definitely a weird one, but doable! Open Queue and hope for a Zarya to grav them all always helps too!