I have never even considered mixing my bud with tobacco. I've been struggling with trying to quit cigs for the last 5 years and I try to stay as far away from that shit as possible. So far its been almost 3 weeks since I had one, so I might be on a roll. Anyways, I've heard it helps it burn better but IMHO I've never had an issue with joints burning unless the bud in them was too wet and shouldn't have been being smoked anyways.