Anyone can correct me if I'm wrong but, I found that a lot of people I was playing with kept clumping together and hardly moving around the map. I found that spreading out to try and trigger Emergency Quests to be the most effective. Then you gravitate to those events and spread evenly between however many there are. Also people who give up make it harder for the ones who stay. With 5 minutes remaining, I was left to fend for myself and I made it with 20 seconds to spare.
TL;DR: Divide and Conquer!