MAG

This trophy is probably the last one you'll get, despite this being a bronze trophy. You'll need to get the Indiscriminate Fire Ribbon 10 times, that means you'll need to kill 10 enemies in each enemy faction in a game, 10 times. To obtain it easily, just go on the two closest points to your spawn, and on each point, there should be a different faction. Just stay in the same zone, try to count the enemies you have killed, and when you reached 10 from the same faction, go to the other point and try to kill 10 people from the other faction.

Thanks to SirkSirk for the tip.