It's interesting how she fits in because she's a lot like Lucio as kind of a brawl-y support. Obviously you still need to peel for Lucio and Brigitte, but she's really great at catching a dive.
I think something along the lines of like
Mercy
Briggite
Tracer/Reaper
Soldier/McCree/Widow/Junkrat????
DVA
Winston
You could kind of split off 3 and 3, with Tracer/Winston/Brigitte taking up a lot of initiation, and having a backline DPS that can apply pressure with the space created. I think you'll have to have a DVA to peel for the backline though (like ALWAYS). I don't think you could really play full dive with her though because she'll just get left behind and murdered by a Winston.