I'd smoke enough to get nicely baked.
If I smoked over my limit it would become hard to function and it wasn't fun especially if I had to be in public or in an environment where I had to pretend to be sober.
I remember one time smoking a lot before a college class with a friend in his car with my bowl and herb he had a tolerance so we wound up smoking a lot and I'd take a hit everytime it was my turn and I got very high and we parked his car to go to class and it seemed like everything was on a very sharp tilt or incline even though we were on flat ground. Class was very interesting to say the least but I don't like getting that high when I have to do things like go to classes or work.
When I used to smoke only 1-3X a month if I was smoking high grade herb I'd smoke only 1-3 hits from a one hitter or small bowl. If it was schwag I'd smoke a few average to large sized joints and if it was midgrade I'd smoke just 1-2 small joints or take a few hits from a pipe.
When I was into smoking only on weekends and by this time I only smoked high quality herb I had a tolerance and I'd have to smoke most of 0.5g and I smoked out of pipes and sometimes a bong when I finally got one.
When I was into smoking daily and had a tolerance and was smoking only high quality herb during the day and night if I was smoking out of a one hitter or small pipe I could stretch out an eigth for a few weeks just by smoking only once or twice a day and with a quickly rising tolerance from doing bong hits from the early afternoon to when I went to bed I'd go through a quarter in a few weeks.
BTW, having a high tolerance was not a good thing. I had to smoke a lot more herb even though it was very high quality, to get high and for me it was a lot more fun when I kept herb as something I'd smoke just on weekends or even one or a few times a month since I'd get a lot more high and have more fun than I would from smoking lots of herb daily.
I know probably a lot of people here on CD love to smoke daily but as I've said for myself it's not something that I really happen to enjoy even though it's very easy to get into doing. I don't care if other people do it. If I were to start smoking or using herb again I'd just try to keep it to a few times a month.
I never rolled joints with tobacco, put tobacco in a bowl, and I never smoked blunts either.