It's hard to peak when you've been training since 1965.
If it's important do it everyday.
The problem is yes, everything works. Doing everything at once makes you marginal at everything... at best.
Squats don't hurt your knees; what you are doing hurts your knees.
If something is important, do it every day; if it's not important, don't do it at all.
I don't care what you bench. I care if you have friends and family you love, a career that you love, and helped someone you don't know today.