First sketches of chibi ponies as TF classes. I’m going against the grain, based off of my own experiences with the game.
 
Applejack as Heavy: Most likely, AJ’s the strongest of the group, the “Tank”, as it were.
 
Fluttershy as the Demo: Pegasi fly, and so do the explosive classes. Also, I figure she’d play the class the same way I did: launch stickies where hopefully no one would see them, run, and detonate.
 
Rainbow Dash as Soldier: Again, explosives for the fliers, and Rainbow launches herself farthest in the air. Also, Shock and Awe seems like her thing.
 
Rarity as Medic: Accent, and hearing Rarity saying, “You want a second opinion, dahling? Your hat is absolutely atrocious.”
 
Pinkie as Scout: Loud, sometimes obnoxious, and a flimsy excuse for her to mix Bonk! with Crit-a-Cola, drinking it just to see what’d happen.