I use 2 different approaches, depending on the previous day's efforts (physical, mental, work, etc).
1. E45s when I want to close my mind and just *WORK*:
start -> my polar watch is set to beep at 15s then 30s later then 15s later then 30s later. effectively giving me 15s to Work and 30s to Rest. Each loop is 45 seconds and mhy sessions are typically 30 to 40 minutes.
i'd spend the first loops with a warmup (2to4 Halos; 1or2 prying goblet squats; hip bridge: each for 15s on and 30s rest).
a bunch of deadlifts. I can get 4-6 slow purposefull reps done in 15s.
then decide on easy,medium,hard day (wave the load) and do anywhere between 12 and 20 sets of 5 1H swings accordingly
depending on time and energy, I'd do more tricks. anything goes with 12kg. many things with 16kg, and still only swings/deadlifts with 24kg,
a few minutes of easy stretching to cool off.
2. full effort + full rest when I'm READY TO GO
the warmup is similar to above. I do not track/monitor this warmup.
the tricks are similar with the weight restrictions (e.g. deadlifts and swings with 24kg; lunges and snatches with 16kg, TGU/Windmill with 12 etc).
I use full effort (e.g. Q&D style of strongly engaging with the swing on the ups and downs) for 4-7 reps of each set.
now I track my rest period by watching my Heart Rate (actually my watch is set to beep when I'm out of my planned HR Zone)
when the watch beeps (HR Too Low) I start my next set. this is around 110bpm (I pass the talk test at about 134 which is also around my Maffetone point)
I do not count the number of sets. I do not check HR while doing the sets, I do not care how high my HR gets. just ensure that it drops to the 108-110 BPM before the next set, I gofor a total of 30-40 minutes including warmup and cooldowns.
I have not been STRONG for the past few months

and restarted E45's 1perweek for the past 2or3 weeks. here is a sample of a recent E45 training session : 82 phases = 41 loops of 45seconds = +- 30 minutes: I think the large spikes relate to lunges, and the dip at the end is when I had to check on the stove then I returned for the last set.
The bottom of the blue zone equates to the trigger-point where I'm READY TO GO in the option 2 training session described above. in those sessions, my watch does not record phases, it just set to beep when I'm out of the blue zone.