For higher intensities, I don't exhale until I complete the rep. /shurg maybe I am doing it wrong but I find I can lose tightness exhaling, granted that is fine for volume work.
I hit the lifts with the greatest importance first. So if it is a light squat day but heavy bench I may do bench first. I prioritize my AMRAPS, hypertrophy and then strength in that order. However...
I get the SSPT chart but I think I would throw the rest time out the window and just take the time you need. Maybe they have a specific purpose but it's mainly bodybuilders...