Brawl: Junkenstein's Revenge

Here's how to beat the Junkenstein's Revenge: First boss that spawns is Reaper. Before he fully forms Mccree starts his Ultimate. Ana will put Reaper to sleep, meanwhile everyone else will be doing Omnic cleanup. If Mccree charges his ult for the full duration, Reaper will die. On the 2nd boss fight, Roadhog will spawn on the right side of the boxes towards the far side of the middle of the map. Hanzo will use his ultimate right when the announcer says Junkenstein's creation will appear. Meanwhile a nano-boosted Mccree will finish him off. Ana will have to use her Biotic Grenade on Roadhog so he doesn't heal up. The third boss is Junkenstein. Hanzo will use his Ult at the top right corner, while Ana throws her Biotic Grenade on him. After about 20 seconds or so, Reaper will spawn. Before he solidifies, Mccree starts his ult. Ana puts Reaper to sleep then Nano-boosts Mccree. Both bosses should die. After a few more seconds, a second Reaper will appear. Mccree starts his ultimate and Ana puts Reaper to sleep. Ana will need to save her Ultimate for the last boss fight. So the Mccree ultimate will not kill Reaper. Ana backs off and focuses on healing only, while everyone kills Reaper. Immediately after, Junkenstein/Mecy/Roadhog will spawn. Hanzo uses his ultimate on Junkenstein as soon as they spawn. Ana and Mccree will use their wombo combo to kill Mercy and Junkenstein. Leaving Roadhog left to finisht he match. Ana will need to use her Biotic Grendade on Roadhog so he can't heal himself. Take him out and that's game.
Soldier and Hanzo should be doing cleanup during boss fights. If played correctly, Mccree should do most damage