I'd say let's do both; let's try every approach, in rational proportions. There is likely an optimal ratio of spending between humanitarian causes and existent

I'd say let's do both; let's try every approach, in rational proportions. There is likely an optimal ratio of spending between humanitarian causes and existential risks. What is it? Is this ratio, and others that have the potential for shaping the future of humanity, openly discussed somewhere? If so, where?