Once You Have Eliminated The Impossible

'A warning to the people, the Good and the Evil. This is war. To the Soldier, the Civilians, the Martyr, the Victim. This is war.'
'A warning, to the Prophet, the Liar, the Honest. This is War. To the Leader, the Pariah, the Victor, The Messiah. This. Is. War'

Welcome to the story of eleven, young teenage girls. They all live normal, teenage lives. Except, for the past year, the date 'September 6th' has been burned into their minds. They don't know why.
But on that day, something extraordinary happens. Everything they love, they thought to be false, is real. Just in different dimensions.
They think it's all fun and games until eleven, is narrowed down to ten.
And if that's not bad enough, the most notorious villains ever, ban together. Lucifer, The Master, Loki Laufeyson, Tom Riddle, and Jim Moriarty.
Now it's time to fight side by side with their heroes, all of them have something special about them, that will help them. They're trained for a year straight.
But, tell me, how can ten teenage girls, and the other heroes, who are such broken souls, defeat five armies?