As someone who has had every sort of treatment thrown at them, I say don’t do any of these things! No child should be in 40 hours of therapy like I was. The most effective thing my parents did was to join me in cutting paper and the things I loved to do. It was the only way I knew to connect with the outside world. All the rest of it was irrelevant. Understanding that your child experiences the world very differently from you is the first step towards acceptance.
Sometimes I wonder what my childhood would have been like had I just been allowed to be able to do my own thing. Stopping my behaviors was the wrong way to go. Fortunately, I’m a pretty patient guy.