For rest periods, if you do - Squat 50% 5х1set, 60% 5х1set, 70% (2+4+6+8+7+5+3) reps
I recommend for 70% the following:
2reps - rest 3min,
4reps - rest 3min,
6reps- rest 5min,
8reps- rest 5-6min,
7reps- rest 5-6min,
5reps- rest 5-6 min,
3reps- rest 3-4 min.
Do not forget that the heavier you are the longer recovery you need.