I'd say around 9~ hours per day. I'm using Perfect Fisher by Perfectius. Obviously, anti-ban and anti-random was enabled. I never babysit my bots. I have them so I can leave and still get stuff on RS.
Surprisingly, I had very very few random events. The only two I noticed were gravedigger and the classroom one. I think it got stuck on the classroom one for a while though. It was trying to switch tabs.