[Kaylee]

I've had a lot of success with going the back-left way as a heavy with a medic and camping their spawn. It never lasts long but even a 10-15 second disruption is almost always enough to break the line (assuming you have good enough people on your team to have a steady flow of ubers, which isn't usually a problem on this server)

The main problem is having that path clear of sentries. But when it is, I have huge success with that strategy.