Best Rep Schemes?

Hi, I guess I would consider myself intermediate. I've been lifting for a few years and have a decent bit of muscle. I've been cutting recently and mostly focused on maintaining my strength but I think it's time for a bit of a routine change after months of the same. My workouts probably fit well in powerbuilding, I usually start with a powerlifting exercise for and then do accessories with higher reps/lower weight until I feel sufficiently fatigued (usually 4-6 exercises total).

I'm actually quite happy with my choices of exercises. I also run 3x/week and would like to continue doing so, so I can only really put squats on certain days without exploding my knees. I also like to train dips and pullups. Both of these constraints mean that I'm limited in full "routines" to choose, but I would like to be able to take a rep scheme and fit it to my workouts.

I know there's 5/3/1, but are there any other flexible rep schemes I can look at? 5/3/1 is pretty low volume and I'm not too great at using it.