easy strength and giant sets

There is no right way to do this. In dan John's easy strength omnibook, he suggests taking as much rest as you can manage, but the program also lends itself very well to short (15min) workouts. 

Giant setting can get the best of both worlds - reasonable rest between sets of the same muscle group + keeping the overall time investment low.

Example

[Giant set1]

Inc press 1x3

Single leg rdl 1x3

Rope climb 1x3

Repeat x3

[Super set1]

Palloff press 1x5

Carry x1

Repeat x2

This is a lot of high quality of work with little to no rest between rounds required. By the same token, working other movement patterns (especially the first Giant set) introduces reasonable rest periods before the next set without having to gage readiness.

This works.