If mistcaller goes west or south at the start of the maze, you need to have a hunter, mage, boomkin or similar to pull the extra adds at the start of the maze. If mistcaller goes north, you can still pull the extra adds early to aoe them down with the pack of two, but it's not required for forces. The maze will not follow this route, but you should end up at about 63.5% forces when you get to mistcaller. As long as you are between 61.92% and 68.08% when you get to mistcaller, it will work.
If you somehow end up at mistcaller with greater than 68.08% but less than 74.24%, you'll need to skip the pack of 2 acidgullets and 2 gorgers to the right of the fork in the bridge. If you somehow end up at mistcaller with greater than 74.24%, you'll need to strategically invis pot past one of the other pots.