After checking the body of Vidyut, Sam got out of the room and immediately went out to take a look at the mountain. Leaving the path alone, he went to take a look at the rest of the mountain. But before he did that, he sent the Bat puppets which he used in taking down the maze formation all over the mountain, to find energy spots that might act as formations.
Generally, formations are made on a flat area whether it is horizontal or vertical.
Even if it is in uneven large land, the nodes would always be on the same plane when they are joined.
This is the most basic and easiest way to creating formations and they don't have to worry about the energy instability due to the irregularity of the terrain and it will also free the formation creator to be free from extra worries and calculations.
These kinds of people will rely on inscribing the formations if there is any particular flaw with the terrain which they cannot rule away.