Been doing manual too for a while now alongside automation with JV.
For amount of follows hourly:
Safe mode : 20 follows / 20 unfollows per hour.
Normal mode: 50-75 follows / 50-75 unfollows per hour.
Agressive mode : 75-100 follows / 75-100 unfollows per hour
Number of total follows a day:
Safe mode : 100 follow / 100 unfollow per day
Normal mode : 100-150 follows / 100-150 unfollows per day
Aggresive mode: 150-200+ follows / 150-200+ unfollows per day
Every account reacts differently according to it’s trustlevel/score.
What I recommend personally is being on the safe side always.
Good luck.