Sir Abacus
Member
Oh, I get Symmetria now.
She's not really a support class, but more of a defender or her own thing: locking down a room, babysitting portals, and attacking heroes like a Pyro in TF2.
The other thing you can do is right click charge and repeatedly send bolts through the incoming assault line. Symmetra projectiles aren't blocked by the Reinhardt shield and will demolish anybody behind him.