Sequencing is clearly both art and science. And both a sound and unsound sequence powerfully impact the student. So the sequence should be considered with deep thought.
If the teacher does not have an idea where she/he is guiding the students in the bigger picture then it would be very challenging to determine how to guide them in the little picture. Teachers who are only trying to build heat in the bodies of students or move them rapidly so they feel “worked out” would conceive one sequence while a teacher trying to move students closer to their source would craft another.
The second element in sequencing is having an idea of what poses have what effect on what students in what ways during what times and how they should be linked. A teacher can do this from an inner intuition, presuming that inner teacher has been cultivated. It cannot be done merely by telling someone to use their inner teacher. We cannot fully access that which has yet to be cultivated.
Or the teacher can use the support of their teacher training, their teacher, and their peers, presuming those three things are sound in the first place. Placing great weights on weak links almost always results in havoc.
New or young teachers are best to offer sound, simple, effective sequences that provide students a generalized practice - until such a time as they are able to soundly offer more. Additionally the teacher must be able to turn to their own practice thus using it as a petri dish to incubate the effect(s) of the sequence in their OWN bodies before sharing it with others.
I don’t think I ever teach two identical classes, in terms of sequences. I do have a mental sketch of what I’m intending but I would be remiss in taking students into Sirsasana if they showed a lack of appropriate action in Adho Mukha Svanasana. Point being I look at the students. Since they are never the same - from day to day, class to class, or hour to hour, then neither is the sequence.