The only faster way to exit Mintwallin iw through the Bonelords. You start making your way back and once you get to the T intersection with 2 rats you go north instead of south, go down the hole (there are 2 bonelords there) and when you emerge you will be at the first part of the maze. This shortcut only works on your way back. It used to be a big time saver back in the day.