Edit, a year later: this absolutely destroyed me in a multiplayer match (as these letter levels often do). I kinda get how the solution saves moves, but I feel I'm still far from understanding it. Great level.
I'm stuck at 91, atm. Will keep looking.
EDIT: Finally got it, about a month later. *********************************************************************************************
Very nice level!
Interestingly never met a 2-off. Was just stuck 4-off until I realized there was more than met the eye in one area, and then the solve was instant. Very sneaky.