You have outlined one of many logical and effective block strategies; however, the question is whether this particular strategy is appropriate for the individual in question.
Personally, I favor lower training percentages in this type of structure, relative to what you’ve written. the exception is if the training percentages you listed are based off of a sub-maximal load to being with (ergo 70-85% of 90% during accumulation) and (90-100% of 90% during intensification)