Junkenstein's Revenge: Narrator's Tale [Challenge]

[Introduction]
Welcome to "Junkenstein's Revenge: Narrator's Tale"! This was inspired by the various Challenge Modes that come around every Halloween for Junkenstein's Revenge. I found them to be very fun, so I thought I'd make my own!

So, what is this challenge about? Well, at the start of the game, a random player in the Lobby is selected to be the Narrator (Reinhardt). The Narrator is immensely powerful, with various stat boosts, and cooldown reductions. Here are the Narrator's stats (Note: Only things changed will be listed here):

[Narrator Stats]
Health: 15,000
Damage Dealt: 500%
Projectile Speed: 75%

Rocket Hammer Knockback: 150%
Barrier Field Health: 7,000
Barrier Field Cooldown: 75%
Barrier Field Recharge Rate: 125%
Charge Cooldown: 50%
Charge Knockback: 200%
Fire Strike Cooldown: 75%

Now, the Narrator seems very strong, and could possibly carry the challenge, so what's the catch? The catch is if the Narrator dies at any point during the challenge, the game ends. Also for fun, the Hero Selection is every Hero that has been playable in any Halloween PvE mode (Junkenstein's Revenge, Wrath of the Bride, and Trials of Sanctuary). How far can you go in Junkenstein Endless on Legendary?

[Questions]
"How many players can this support?"
This can support as many as 6 players! It's recommended to play 4 player, but you can play with as many players as you like, even 1 or 2 player! (Just make sure to adjust the Lobby size to the exact number of players in the Lobby in order for the game to begin)

"Can you still lose when the Door Health reaches 0?"
Yes, it's still possible due to limitations. However, as a compensation, the Door Health is 500%, so it's a bit difficult to lose (at least early on) to the Door being destroyed.

"Do you plan on giving the Narrator special abilities?"
I actually did plan this. However, I was unhappy with the abilities I added. Either that, or they didn't work the way I planned it. If this gets enough recognition, I might sit down, and overhaul the Narrator a bit, to give him new abilities.

Keep in mind this is still in beta, so some bugs may occur. However, I think I did a good job catching bugs. Feel free to submit your strategies, and how long you lasted in the comments!