A blog post by tcaudllig made me come up with this theory.
So it just so happens that each IM belonging to a particular quadra, either complements (doesn't interfere with the normal development of the other adjacent-quadra IM) or interrupts its normal development. In other words, some quadras "beat" others, and the way it works is like this (in sort of rock-paper-scissors fashion):
Beta ---(beats)---- Alpha ---(beats)---- Delta ---(beats)----Gamma ---(beats)--- Beta [closed circle]
The way it works is the following (Model B intricacies incoming):
Beta -Se is shared in full IM with Alpha +Si (since the full element is -Se/+Si). Then, it appears they complement each other(Although I think maybe the one from the progressed quadra is a more "advanced version").
Same thing with +Ne and -Ni.
This is the case for shared combined IMs.
But then, +Fe seems to "interrupt" (beat) -Ti. And +Ti seems to "interrupt" -Fe. The result is that Beta is the quadra that "beats" alpha.
The IMs that "beat" the ones from the adjacent quadra, do so by causing (best way to explain it) the beaten IM to not being able to influence the development of the winning IM. By contrast, the winning IM can interrupt/interfere with the losing IM with ease.
In the case of opposite IMs (from opposite quadras,) none have an advantage over the other (for example +Fe and +Te). Although there probably is some sort of "Rosetta Stone" that mandates which IMs are objetively more important than others (I guess maybe if some quadras ---their valued IMs -- are objetively more advanced than others, which is debatable, but I do believe it. Even if the circle repeats, I do not think beta is objetively superior to alpha, and maybe delta to gamma neither).
So this is how "quadra progression" actually works. I think it probably cannot go on reverse normally, unless some factor was at play that unbalanced the normal progression.
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If somebody understands this, I welcome any questions.