Any guidelines for sets and rep ranges for things like Ys, Ts, Ls, scarecrows, skiers, and band pull-aparts for shoulder prehab?

To warm up the shoulders I sometimes do 5 reps of them all back to back with no rest, with 5lb DBs. (not the band pullaparts)

But for actual prehab, how should I run this? What set/rep range? Do them all back to back still, or split them up like any other exercise.

I was going to do this as prehab 3x a week either after I lift or before bed.

Any other recommended shoulder prehab work?