In practical terms this method is a horses rear end...
too much confusion about what should happen and when, I’m my opinion.
If if you are concerned about the shear, either don’t depart,
or a much more simple method, without all the flightdeck ambiguity at a critical time, is to just use full rated thrust and improved climb data.
It will give you all of the extra performance, without the extra brain ache....
Just my 2 cents