If you want to increase muscle mass, you have to train more frequently.
If you want to improve strength, you have to increase the intensity.
However, your training schedule should be flexible according to your condition and recovery ability.
When you are getting older (I am 40+), my recovery slower than when I was 30. I have to control my training frequency and intensity.
By the way, no one can break Personal Best (PB) every week. If it happens, it is a LUCK!
Compound lifts are our main courses - Back Squat, Front Squat, Deadlift, Snatch, Clean & Jerk, but we also need to spend some time to do Remedial works for our weak-links.
Here are Five Remedial Exercises:
1. Trap 3 Raises
2. Dumbbell Chest Supported Cuban Press
3. 1-arm Cable External Rotation
4. Dumbbell Cuban Press
5. Barbell Cuban Press
Credit to Strength Sensei