There are a ton of Battle Mercys out here in Uprising. I know you guys want a medal, but geez, would it kill you to look around for people to heal rather than full-on Leeroy Jenkins attack, attack, attack? I feel a bit out of sorts after being the Mercy myself and being constantly on the healstick to make sure everyone's safe or the primary attacker gets boosted. I had a session where a troll battle Mercy was apparently so focused on nailing a Bastion in the far corner on the final objective she missed me twice calling for heals, and ended up with me having to literally run in front of her to get her to finally heal me from 15 health. She also teabagged me when I died earlier and didn't even bother trying to get me up.
EDIT: I feel like Zen/Mercy/Bastion/Torbjorn is an absolute beast in this mode, especially against Detonators, but the lack of tank is probably not good. Maybe Orisa instead of Torb?
EDIT2: Also, some fun facts. Tracer's Blink can distract enemy Nulltroopers and Bastions, though with Bastions it's a bit iffy. Blink into the enemy, unload, then Blink back to take nearly no damage from surrounding Nulltroopers. There's a big glowing bit on the back of Eradicators, which control their shields. Blink behind them or otherwise distract them into turning, then fire away at it. Charging into one will also obliterate the shield outright on a pin. Detonators do have heads, which can be headshot - it's that odd protrusion near the top of the sphere. Bastions moved out of their position (through Charge, Hook, boops, etc) will immediately go back into Sentry mode if it isn't already, and head right back to that position.