Personally, I don't touch Trazadone unless I need to knock myself unconscious for a few hours of actual sleep, then I take 100mg. But I know the next morning I'll be useless.
Clonazepam- I take 1mg in AM, 1mg at bedtime ( or what I hope will be close to when I fall asleep). From what I understand, that's a higher end dose. I will also take one mid day if I feel the symptoms of acute anxiety, increased heart rate, and violent impulse. It keeps me able to focus and exercise control. Ordinarily, I wouldn't have issues with violent tendencies, but when things get bad I have no other way to let out the adrenaline.
The real miracle for me was Prazosin. When the nightmares come, I don't remember them as clearly, and I'm able to settle shortly after waking. I might have to change my nightshirt due to sweat, and sometimes I throw up, but mentally I can calm my mind. This allows me to go back to sleep –something I could never do before.
The trick with Prazosin is that you can only take it at night. It will drop your blood pressure so strongly that you won't be able to walk around without extreme dizziness, or possibly falling. It drops your blood pressure in a major way. But that's the point, it blocks adrenaline.