My cluster is the most frequent my neurologist has ever seen. 5 consecutive days every 6 weeks for the last 13 years. The only worser pain I know is seeing my own bones outside.
Here is what works for me: Etoricoxib 90mg (banned in USA) and Lignocaine 1% + Triamcinolone Acetonide Injection on a nerve behind my head (ask your neurologist, only he can find the right nerve).
Etoricoxib can be synthesized in an organic chemistry lab. Perhaps american clusterheads ought to form a group and secretly fund a post-grad or professor to synthesize it for you. Make sure you take it in the right doses.
Etoricoxib lasts for about 20 hours on a single small dose. Lignocaine injection works for many weeks on a single shot.
As for coping with it metallly, may I advise reading Atlas Shrugged by Ayn Rand? I know Ayn Rand is the most hated person out there, but her philosophy helped me more than any psychological counselor out there.
Oh and stay away from all forms of religion and pseudoscience. Religious people will hurt you more than help you. Homeopaths and herbs will hurt you too. Trust me on this, I’ve tried them all.