Timer 1 enabled from 18:00 till 08:00. That means bot will not work from 18:00 till 08:00 of local time. Working time of a bot is from 08:00 till 18:00 and equal to 10 hours. 10 hours per day is 'safe' time. Usually people dont play more then 10 hours or do this casually on weekends, not every day.

Timer 4 makes random intervals of 8-10h when bot works and 0-2h when bot does not work. We had 10h interval defined by timer 1 and when we apply timer 4 we have possibility that timer 4 initiate random log off somewhere between 08:00 and 18:00  and duration less then 2h.

5th Timer is applied to make 6 days of working time then random day when bot does not work.