Programming order decision

I am seeking to peak for a fitness test in October, consisting of bodyweight calisthenics and running. Besides this test for my job, I try to work toward full body composition/strength goals. For most of the year I train HIIT programs, but lately I've done more hypertrophy focused programs (Heatwave, now finishing up Highway to Hypertrophy).

My current plan is to return to HIIT in September/October, but continue on hypertrophy and high resistance strength (mainly, Coach T's upcoming new program) in July/August.

The question is (and I realize the net difference in outcomes may be minimal): what order? Strength building with the July monthly challenge followed by more hypertrophy in August, or vice versa?