Start with the simple passage
In the first Heroes room, the Warrior pushes through the two offset crystal openings. The three-plate room shows why access around the cluster matters: moving one object can block the side needed for the next push.
When monsters and teammates join
Later checked routes use pushes with goblins, dragons and other heroes. A solution for an empty crystal corridor does not establish a safe move beside a monster. Use the room-specific hints and preserve the character-switch order.