Stackings 'duality'

There are a couple of interesting features in this stacking theory.

First there are sort of quadra's, although there are only two instead of four. Let's call them the duplets and label them according the stackings flow.

Outsiders duplet: Sx/So, So/Sp, Sp/Sx
Insiders duplet: Sx/Sp, So/Sx, Sp/So

Now what I've read on a site and experienced in real life, is that when your partner has your main instinct as their third 'disregarded' instinct, the relationship will not work out for you.
Fortunately this rule alone narrows it down enough, if you would want to find out which one of the six stacking types would be your most compatible instinctual partner!

Let's take for example Sx/So. This type is from the Outsiders duplet. So all partners from the Insiders duplet will suck a bit, not totally, but for a true 'dual' you will want to find one from the same duplet.

However the So/Sp cannot be the partner since it misses your main instinct, which annoys the crap out of you.
The Sp/Sx shares your main instinct, however, if you look the relationship from the Sp/Sx perspective, he/she will be annoyed the crap out of you since you don't share their main (Sp) instinct.
So the best ("dual") instinct partner, is the Sx/So in this example, the same stackings as you have!

Let's for fun try to label the 6 relationships:

Same duplet, same stackings: Attraction
Same duplet, your main, their last: Bored buddies
Same duplet, your main, their second: Comfortable
Different duplet, mirror stacking: Energizers
Different duplet, your main their last: Dull
Different duplet, same main: Semi-Attraction

These are just some idea's. I bet you guys can improve on it!