[x] Start helping people. There's plenty of people in this fight that could use a hand. You'll help them out, get the ones that can still fight to join you, and keep it up until you have an entire group of fighters behind you.
[X] Find some help. You're not gonna be able to pull this off alone. You'll need people who can help you keep a group together in a fight. Hose and Ritsuko are probably around somewhere, so you'll start with them.
[x] Speech Time! You've been waiting for this moment! It's time to find the tallest object you can, get on top of it, and give a rousing speech to rally everyone together!
[x] Just start punching! Screw anything fancy! You'll just keep knocking assholes to the ground! You'll eventually make a big enough dent to give your guys a chance to regroup!