This script is especially helpful in scenarios, when you're on the brink of giving up or hesitant to turn a corner and risk having to re-explore everything all over again, because you're low on health and the last time you hit a pattern buffer was half the mission ago. It's great for making sure you found everything you might've missed, and for reassuring you that you didn't soft-lock yourself. Its only con is its tendency to suggest you paths that are impossible to follow, which can be negated by just moving a bit so it can recalculate.
Finally, a plugin that ruins mararthon.
This is a plugin for any marathon scenario that will act kind of like GPS navigation when activated. It can show just about any worthwhile objective on the map, and in most cases lead you directly to them.
This is a huge cheat, so it's not really recommended if you want the "true" marathon experience. It's for people that either don't have the patience to navigate through mazes themselves, or for people that just want to make sure they found everything on a given level. It can be very useful for tracking down all secrets.