So my wife who is very mathy was looking at the choices here, and she thinks the priority should be changed to be this:
1. [3,7]
2. [2,8]
3. [>5, <5]
4. [1,9]
The reason for this is a scenario like
2,5,8,8
In this case it will be trying to balance a 2 and an 8, but then due to random events...