I think you're overthinking it, just like you have in previous threads.
If you increase the weight on the first set, and you use 80% of that first set for sets 2-4, you'll automatically be increasing those later sets consistently too. So, yes, fine. Do that.
But like DT was getting at, using progressively more weight for 6-8 reps will build plenty of muscle, so that's certainly "hypertrophy training".