I do not advocate this now as I'm a bit older than when I did it and I had much different goals, but I followed a bit of a Korte 3x3 style of program during a base building phase when I was very much focused on powerlifting.
At the time, it worked really well to build work capacity more specific to powerlifting and the big three, put on a bit of muscle, and keep my bodyweight in check for whatever reason. The sessions did get boring but I don't train to be entertained so I was good with it.
Day 1: Squat (8 sets of 5), Bench Press (6 sets of 6), Deadlift (5 sets of 5)
OFF
Day 2: Squat (5 sets of 5), Bench Press (8 sets of 6), Deadlift (5 sets of 5)
OFF
Day 3: Squat (5 sets of 5), Bench Press (6 sets of 6), Deadlift (8 sets of 5)
Day 4: Accessory Work (Pull Ups, Tricep Work, Shoulder Work, Uni-Lateral Leg Work, Core Work)
OFF
Every set of S/B/D was based on my most recent (raw) 1rm:
Week 1: 60%
Week 2: 62%
Week 3: 64%
Week 4: 66%
Week 5: 68%
Week 6: 70%
By the end of Week 6, I was getting fatigued and ready to either deload a week with reduced volume to hit another base block with 5-10lbs added to each lift or to start taking volume back down and adding a bit of intensity to ramp up to testing new 1RM's.
Again, this was in my late 20's to early 30's as opposed to now pushing 40 with much different goals.