User blog comment:Epzilon/Eleven Supernova (Continued)/@comment-3403804-20151024004805/@comment-3403804-20151024023803

Excellent, so here's what I'm suggesting in regards to those ranks. A set up like this might work out well.

"Those With Future Potential"

Numbered 13-9

"Those With Current Potential"

Numbered 8-4 

"War Potentials"

Numbered 3-1

Basically, the Number is assigned based on the reason your character is a Juusanseiza in the first place. The rank is therefore largely awarded by consensus rather than on a first-come first serve basis, increasing your threat level so to speak is actually as simple as your character doing something new and exceptional that the Central 46 believes warrants increased scrutiny on their part.

It's fairly unlikely that the members would know their own number though, as that's probably something reserved solely for the Central 46 and important officials. At least so I'd imagine.

For the best results, I think one person should be in charge of deciding the numbers. I nominate Sei for that role, since his Minato is likely going to be numbered 13 on the list, and therefore he'd have the least amount of ego involved in the decision. Sei was also appointed to be in charge of it, for the most part, so it goes hand in hand.