I don’t know if it will be a collective recitation or if there will be someone who will lead the recitation. In a group, the taller people stand on both sides and the taller people decrease toward the middle. This may make the sound a little more concentrated, and the sound made by everyone will be louder, or conversely, the arrow shape will look better. If you have a leader, you can do the third level. The first level is just two people, and the second level can form a class, such as Trinity or something. All those left in the final level.