Honestly, if the device is working don’t put a lot of faith in the LQI numbers. I have some devices with low LQI numbers and the function perfectly every time. I had other devices with higher LQI numbers that would fail. Also, don’t put a lot of faith in the map topography either as a device can switch repeaters at any time. The map goes off the data table listings in the repeater devices. If they have not been emptied since the move of a device the map can be wrong.
Best method is if it works don’t mess with it. If it doesn’t keep repairing until it becomes solid. The system will let you know by it working.