I am currently following your older 6,6,6,3,3,3 program with a push/pull/leg split. Each day, I choose 2 exercises and perform strength sets of 3,3,3,6,6,6 on both main exercises. I then perform strength capacity work with the same two exercises for alternating sets of 6,6,6,6,6,6.
For leg day I have chosen squats as my first main exercise and was looking at trying barbell hip thrusts as my second main exercise. Do you see hip thrusts being suitable for both strength and strength capacity work?
Many Thanks CT