Ban rate is pretty high overall. Jagex have done a good job improving their bot detection system. The least bannable scripts would be the ones that the least people use, like private scripts etc.
I suggest you give dreambot a look. We're offering free VIP to all users who register for a limited amount of time. Got a variety of scripts and experienced scripters, as well as a friendly community.
I've been using tribot and premium scripts with God breaking ect. Was good for a month then got a 2 day ban. I babysit and chat while I'm bothing as well.