For those of you doing meph runs knowing pathfinding can be very handy and save a lot of time.Q: What is pathfinding?
A: Getting to mephisto using no hack just knowledge about d2 level structure.Lets get on to the guide:
The fist thing to do when you enter the level 2 wp is to check your surroundings. You will be in a "room" with only one exit. Let you character face towards that exit.
From here we can apply the following rule for pathfinding to mephisto. The entrance to lvl "room" will be on your left.
Here is a better visualization for those who need: