Tranzit bottleneck/holdout positions

[binaryconstituent]

After engrossing myself in the seemingly endless hunt for extra easter egg steps in Tranzit, I've decided to take a small break from all that and talk strategy for Tranzit. Although I enjoy kiting/training or whatever you may call it, I also highly enjoy getting a few friends together while attempting to establish a really good checkpoint or holdout position. What are your favorite choke points/holdout spots on Tranzit? Personally I love holding out at the power plant where the circular walkway is, having one person standing on the elevated boxes thinning out the oncoming horde while the others, preferably with ray guns or LMGs, are watching the main approach.

[Ourobos]

At the bus depot, leave via the 750 door. Then use a turbine to open the first outside door.. Once inside it stays open. You have four people, one entry point.

[Double G-6]

Obviously the Pack a punch room. 1 by pack a punch other 3 in the corner intersection. Knuckles and 2 good guns plus a turret helps in later rounds. I know that a lot of people use this method to make points not to mention easy to bank.