I'm just going to add that you (OP) are already taking 3 very powerful prescription pharmaceutical drugs between the ritalin, strattera (I think that's what you meant) and clonazepam.
Both ritalin and strattera are known to be activating and both have the possibly of causing or increasing anxiety. Armodafinil also can do this and it too is very activating.
I can't make a suggestion without knowing what symptoms you're having trouble controlling. As someone with ADHD myself and the countless hours I've spent learning about the disorder and treatment (including pharmaceutical, lifestyle, learning skills, and therapy) I know that this is a disorder with a broad range of symptoms. My ADHD isn't your ADHD so to speak and it's a disorder that isn't cured, only symptoms are lessened.
I'm curious, have you tried anything to treat ADHD other than medicines. The medicines definitely are life changing for me, but the other things I listed above were/are just as important.
For me, the combination of Nortriptyline (similar MOA of Stratterra regarding ADHD) and adderall were amazing for focus and help some with motivation. But I still had issues with restlessness motivation. That took learning some life skills in therapy. I also keep aniracetam and theanine around when restlessness or anxiety become real bad. I've learned a lot about those two substances and I knew what symptoms I wanted help with. I also made a medication log where I would jot down notes about how I was feeling 1-2x a week so I could then look at those notes a few to several weeks later and see if I notice patterns and get a really good idea whether they're helping or not.