This looks good. I do this with conditioning with strongman implements and barbell complexes. I start off with 1 rep 1st set then add a rep until I can't no more or go all out usually by the 5th or 6th as you planned. Also it allows you to shut it down if you not feeling it.
For heavy weight 85% or above I probably would just do 4 working sets, 1rep,2rep,3rep,MAX reps just not to do too many sets and burn out, but mainly for Squats & Deadlifts.