Hehe, thx Jean-Pierre 
We have such an automatic process already, but we’re aiming to let a human take the final decision on what should have a priority, especially when that process fails or doesn’t give optimal results for a given task.
So, well, since my post I’ve read a few threads on “ranking” and sorting such as this one, and that seems to be helping me on my initial solution. But I’m trying to reach a very highly ergonomic approach so that the human that’ll do the job can do it really very quickly, and thus I’m trying to find a way to do it visually. This post has hints on how to achieve this, but it seems I’m falling on the “undocumented / unreliable” side of Coda 
In the end I agree that even if my initial problem is on the display, maybe a better model could solve this entirely, for sure.
Thx for your doc, it showed me the “color coded column” that’s quite neat compared to conditional formating!
-Laurent