Make sure to never follow and unfollow on the same day.
I would say the longer you wait the better is between for follow and unfollow, like take your time to unfollow but if you know you loose the traffic or you see it drops go back to following but if you're not dropping I would say, the longer you can wait, the better.
Low limits include playing it safe to ensure longevity. So for the amount 75-250 Follows and 45-120 Unfollows a day would be ideal.
After the mass ban wave there seems to be struggle commenting & liking so play it safe while holding true value over the long run.