the point in botting smart is you do multiple skills, not just 1 skill to 99, then work on another one. I have over 100m total exp now, if I just botted single skills I would have 7 or 8 99's by now. but by doing that it becomes obvious to Jagex and others that your botting. My plan is to get most of my skills to mid 90's then stop playing on the account for many months. securing that the ban hammer isn't just waiting to slam, then sell it.
Yea there is a paid slayer bot that is semi-working, it only does 1 task then shuts down atm, but should be up before too long. if the slayer bot doesn't support a task I use a Auto fighter to do the task for me.