Cool. 
I didn’t have the idea of ordering reviews by leech score. I wonder how that works out in practice. It seems it is worth a try.
When comes the time to studying leeches I suggest trying Item Inspector. It supports two studying mode. You can go over your item in a table, much like Dashboard Leech Table, reciting meaning and reading, and then you have the meaning and reading revealed in a popup. You can also start Self-Study Quiz to be quizzed on your leeches. Disclosure:. I am the author of Item Inspector.