Got the trophy boosted with a friend it was the only way to get it fast. Both need to enter matchmaking same time if both get accept match at the same time accept it with some luck both are at the enemy team. Then let your friend wait near his spawn and run to him to kill you 15 times. Then kill him. But he need to be careful if an enemy is coming he need to run into the spawn room. You guys need also luck that the round is going long enough. But thats how i got it. I would recommend to do it before open beta its harder to get into the same match then.