I suppose that if any assistance were to be had, I'd be willing to engage in it as long as it wasn't unethical and immoral.
It beats 0% doesn't it?
I would say it equals zero percent since you have a 25% chance that it will help but have the same 25% chance that it will make the condition worse! hmmm.
Knowing that you would have the same chance that the prayers would worsen your condition?