I thought about the Mane Seven and I thought of what their roles could be if they were in a RPG game, here's what I thought of:
Princess Twilight Sparkle: Super Tank/Defensive-Supportaive Mage
Applejack: Phyiscal Tank
Fluttershy: Cleric with high Criticals
Pinkie Pie: Troublemaker Speed Demon
Rarity: Jack-Of-All-Trades/Magic Tank
Rainbow Dash: Hit-And-Run Master
Starlight Glimmer: Chaotic Magician/Semi-Magic Tank