Mercy is a Healer Support, she has a staff that can both Heal and Buff allies, a secondary pistol and three abilities. For this trophy, we'll be using the heal function of Mercy's staff.

Mercy's staff has the ability to heal allies for 50hp per second, this means we'll be spending four seconds with each of our allies to heal them, you can only heal allies when they're damaged and you should keep track of who you're healing whilst always healing more than you feel you need to just so you can make sure that your trophy pops. A good way to get to allies is using her "Guardian Angel" ability which is by default bound to  as it allows her to fly in their direction. Keep out of danger though as her pistol - while it does deal good damage for support - will not hold up against something like a Solider 76 or Tracer without you knowing exactly what you're doing.

We'll really want our team to be using tanks for this trophy, so the best way of getting this set up is to have the whole team as premade players, you can either grab friends or use the Gaming Sessions section of the site to find a group.

Group Health Plan Video Guide

Credit to Stay-Pationt Gaming for the video.