I have written a lightweight script for reordering reviews by SRS level so feel free to use it if you like.
I was too lazy to create user interface for it, so it’s just a small button at the bottom of the page, but you can edit some settings in the script itself. Available features:
- ordering by SRS level (ascending or descending),
- ordering by item type (rad->kan->voc, reversed or random),
- deciding which ordering has higher priority,
- forcing meaning and reading of item to be directly next to each other,
- forcing reading before meaning or meaning before reading.
Note that it may not work properly if other reorder scripts are active. Works well with Wanikani Review SRS/Level Indicator.