If I understand correctly, the ultimate goal of solution stability of the body (or bodies) is to obtain the maximum energy conversion efficiency from it with minimal energy costs.
Although energy and stability are related, but not this way: In general a system is (more) stable when its energy is minimum. Consider a coin on a table. When it lies flat, it is stable,but if you are able to put it standing, it is not so stable, because you can take it down and extract energy from it by little touch. Same for the chemistry. Ash is more stable than wood.
In my videos, floating magnets are in stable conditions however stability is more or less delicate.
But why in that case do you think is more promising to seek a solution to this problem in quite difficult to obtain stability of levitation of objects in electrostatically focused alternating electric field, and not in levitation of superconductors or diamagnetic levitation?
These experiments have nothing with electric and electrostatic, they are purely magnetic basis. Videos shows the stable levitation is achieved in various ways. Check the earlier video https://www.youtube.com/watch?v=G7pOxn5HIm8
. See how the floating magnet stand to jerks.
In HTSC superconductors, the Meissner effect is very cool and not completely understood. It is described as magnetic flux lines get 'pinned' in small vortexes holes through the superconductors. OTH, diamagnetic levitation is very weak and not practical unless you produces several Tesla fields.