As little as possible, to produce maximum results.

Longevity (specially orthopedic). You only have so many “reps in the tank”, regardless of how perfect your approach is.

Minimize stress. Less demanding on recovery.

Less caloric demands to accomplish the goal (especially important for hard gainers, people that hate eating, and those further along the training journey)

Always keep the idea of somewhere to go from here (save some bullets, don’t shoot them all at once)