This is an attempt to map a 2-D space on a 1-D scale. Not very possible.
Oh, mathematically speaking it is entirely possible. Easy, even. Though, if you are not careful, you can lose information in the process.
But, so long as the scale you are mapping into is of equal or greater ordinality than the scales you are mapping from, you don't need to lose information. However, in so doing you may either inject information that was not in the original data, or merely imply relations in the data that did not exist.
For example, let us assume the 2 dimensions here are "investment as GM" and "investment as player". This makes some sense - some folks can be highly invested as a player, but hate GMing. And some folks can love GMing, but not get much of a kick from playing, right?
So, assign the levels of player-investment to odd numbers, and GM-investment to even numbers. No data is then lost, if you know the mapping. Of course, that ranking kind of implies that the lowest-rank player is less invested than the lowest-rank GM. Which is not necessarily true.
The basic flaw is the assumption that "investment" can be measured and assigned a numeric ranking.