After doing more research on cm strats I found another one not posted here.For max speed, after the gong boss, mount a 2 person mammoth and run it into the door (the one that will be blown up). If passengers eject they land on the other side of the door.The person mounted will either be stranded on the other side untill the RP event finishes, or he can be lifegripped through if you have a priest. Credit to mantraz on reddit.
Edit: my personal suggestion would that if a life grip work I think that a locks portal might also work. So you could have the lock drop it before they hop over via mount and then everyone could get through quicker. Haven't tested warlock port but any confirmation would be appreciated