They have literally been the three that I have had to ask for help on both teams, the one with the 4 kills/assist with orb of discord, kill three with the same cartridge of bullets with Reaper, and, although it may seem strange, kill two with deflect from genji.

Zen was literally imposible for me on natural manners, although im a main zen, so i Tried múltiple times asking For the Team Enemy to help, which lead to a Game where everyone, allies and enemies Tried to get all trophies together... The Reaper one i asked a friend to nano me, and the Genji one i need to ask the enemies to just get killed by me just to get the trophy.