Basically, how this chart is supposed to work is that you take your type and average it with any other type(s) you are as well. Then your highest scores are your more ideal matches. You could do something like assign each rank a number value in with constant intervals between each value.
So if you are an INFP with developed functions to classify as two types then you would average the scores of both types together and get your highest compatibility types.
Okay, I don't know if anyone will want to read this part, but this is the logic I employed to come up with the table.
So how the chart works mathematically is that you take your dominant, auxiliary, tertiary, and inferior functions and pair them against the other types dominant, auxiliary, tertiary, and inferior functions. This is done in such a way that two totals are created: total similarity and total interest. How the similarity is calculated is that you take Fe paired with Fe and add the value of the lowest Fe score to similarity and do this with all the functions. Then interest is calculated by taking Fe paired with Fi, same cognitive function paired with its extravert/introvert opposite.
I assigned the values to dominant=8, auxiliary=8, tertiary=4, inferior=2, all shadow functions =1. And the total score is the summation of the similarity score and the interest score.
And when I did this I found five different types of values
24 28 30 32 34
Horrible Bad Neutral Good Excellent