Topping your plant will stress it, and auto flower don’t like delays. You grow autos so you have seen this pattern. They are usually bushy and size varies drastically. Low stress training, bending, removing unwanted side shoots to shape the plant and tying down branches will keep her going strong without too much stress. Topping an auto won’t create more bud sites, it will just shorten the plant, delay it from flowering and maturing on time. Hope this helps.