Vectors used:
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To be fair, I think a lot of them have. Twilight took an anvil and then a piano to the head, in succession. A normal pony wouldn’t walk away from something like that.
Chrysalis might play a bit like Sombra, but instead of hacking an enemy she takes their form for a brief period and can sneak behind enemy lines this way.
Discord would be much like Junkrat, of course.
Fluttershy on defense because I can see her gameplay revolving around setting up her animal friends to guard points, kind of like Torb’s turrets. Imagine trying to capture a point and seeing a bear rush at you out of nowhere!
Trixie would be able to place several different glyph traps on the ground.
AJ might play a bit like Roadhogg with her lasso and can eat apples to restore her health.
DJ would would be an obvious fill-in for Lucio.
Zecora’s gameplay would revolve around her potions, her main being an explosive one. She’d also have a poison joke potion to disrupt enemies and a healing potion for her allies.
Edited
Mostly agree, but I’d have Derpy as my tank, and Trixie as my Defence.
Offense: Celestia
Defense: Starlight
Tank: Applejack
Support: Rarity
Offense: Queen Chrysalis
Defense: Princess Luna
Tank: Applejack
Support: Spike