What has been found to be the best treatment for rsd/crps? How can one get sleep through the intense pain?

Structured program . The treatment is a combination of medications, aggressive physical therapy and invasive methods (nerve blocks, nerve stimulation). Common medications are Gabapentin or pregabalin, tricyclic antidepressants (improve sleep as well), muscle relaxants, etc.
Pain control. Chronic pain will lead to insomnia and depression. The key is pain control. The usual pain killers and the commonly used morphine derivatives are not going to do it. You need special medications for neuropathic pain. There are effective strategies that can make your condition better and restore quality of life. Talk to a competent pain specialist.