If you're adjusting reps, you're probably adjusting volume... Unless the small range just means you're not really adjusting them by much.
My point was mostly that you can either go in and do say 10 total sets between two exercises and rotate the exercises after deloads or you could do 10 total sets between 10 exercises and never rotate them so you get real good at them. The latter seems pretty silly but without the rotation I guess that's what you'd have to do because you can't do 30 sets week after week and increase intensity over time because you'd never recover from it. Thus, a smaller variety with a reasonable rotation frequency makes more sense. Every workout is too frequent imo.
And, you're right... I just kind of threw 4 weeks out there since that's a pretty standard time between training cycles but there's no hard fast rule about it. I will say though, the more advanced a lifter you are, the more likely you'd need it to be every 4 weeks because you'd need to back volume off by then... A novice lifter shouldn't need it as often because they aren't lifting the same intensity (heavy weight) as an advanced lifter... And if an advanced lifter doesn't need it, they probably aren't lifting very hard because you'd have to accumulate fatigue somewhere.
